What will be the 90% of 20?

90% of 20 is 18

Working out 90% of 20

1. Write 90% as 90/100
2. Since, finding the fraction of a number is same as multiplying the fraction with the number, we have
   90/100 of 20 = 90/100 × 20
3. Therefore, the answer is 18

   If you are using a calculator, simply enter 90÷100×20 which will give you 18 as the answer.

MathStep (Works offline)

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Find another

90 percent of 20 can be written as 90 percent *20 =

(90/100)*20 =

(90*20)/100 =

1800/100 = 18

Answer: 90 percent of 20 is 18

Percentage calculation with steps

Use the percentage formulae (P% × Y = X) to find out 90% of 20

First, write the problem as an equation : P% × Y = X

Here, P is 90, Y is 20, so the equation to solve is 90% × 20 = X

Convert 90% to fraction

• To convert a percent to a fraction, just remove the percent sign and divide the given number by 100
• 90% = 90/100

Substitute 90/100 instead of 90% in the above equation, then 90% × 20 = X becomes 90/100 × 20 = X

Solve for X:

• X = 90/100 × 20
• X = (90×20)/100
• x = 1800/100 = 18

Therefore, 90% of 20 is 18

Solution and how to solve it

• Home
• Percentages
• What is 90% of 20?

Calculating the percent of a number is simple, but can be a bit tricky if you aren't careful. Luckily, it only requires a few basic operations to get to the solution: multiplication and division. If you haven't learned what percentage is yet, or would like a little refresher, feel free to check out our introduction to percentage page. To solve percentage problems, it may be useful to use a calculator. But, they can also be solved by hand or in your head (if you practice enough). So, how did we get to the solution that 90 percent of 20 = 18?

• Step 1: As we know, a whole of something is equal to 100%. In this case, we want to find what 90% of 20 is. We know that 100% of 20 is, well, just 20.
• Step 2: If 100% of 20 is 20, then we can get 1% of 20 by dividing it by 100. Let's do 20 / 100. This is equal to 0.2. Now we know that 1% is 0.2.
• Step 3: Now that we know what 1% of 20 is, we just need to multiply it by 90 to get our solution! 0.2 times 90 = 18. That's all there is to it!

When is this useful?

Percentage is one of the most commonly used math concepts in day-to-day life. You can use it to calculate a gratuity on a restaurant bill, or to grade your score on an exam. It is useful to know your percentages well!

Use this calculator to find percentages. Just type in any box and the result will be calculated automatically.

Calculator 1: Calculate the percentage of a number.

• For example: 90% of 20 = 18

Calculator 2: Calculate a percentage based on 2 numbers.

How much is 90% of 20? What is 90% of 20 and other numbers?

'Percent (%)' means 'out of one hundred':

90% = 90 'out of one hundred',

p% is read p 'percent',

90% = 90/100 = 90 ÷ 100

90% of 20 = ?

... is equivalent to multiplying them:

90% × 20 = ?

90% × 20 =

90/100 × 20 =

(90 ÷ 100) × 20 =

90 × 20 ÷ 100 =

1,800 ÷ 100 =

18

If 90% × 20 = 18 =>

Divide 18 by 20...

... And see if we get as a result: 90%

100/100 = 100 ÷ 100 = 100% = 1

Multiply a number by the fraction 100/100,
... and its value doesn't change.

n/100 = n%, for any number.

18 ÷ 20 =

0.9 =

0.9 × 100/100 =

(0.9 × 100)/100 =

90/100 =

90%

The symbols used: % percent, ÷ division, × multiplication, = the equal sign, / the fraction bar, ≈ approximately the same. Writing numbers: comma ',' - as a thousands separator, point '.' as a decimal mark.

Page 2

'Percent (%)' means 'out of one hundred':

80% = 80 'out of one hundred',

p% is read p 'percent',

80% = 80/100 = 80 ÷ 100

80% of 7,520 = ?

... is equivalent to multiplying them:

80% × 7,520 = ?

80% × 7,520 =

80/100 × 7,520 =

(80 ÷ 100) × 7,520 =

80 × 7,520 ÷ 100 =

601,600 ÷ 100 =

6,016

If 80% × 7,520 = 6,016 =>

Divide 6,016 by 7,520...

... And see if we get as a result: 80%

100/100 = 100 ÷ 100 = 100% = 1

Multiply a number by the fraction 100/100,
... and its value doesn't change.

n/100 = n%, for any number.

6,016 ÷ 7,520 =

0.8 =

0.8 × 100/100 =

(0.8 × 100)/100 =

80/100 =

80%

The symbols used: % percent, ÷ division, × multiplication, = the equal sign, / the fraction bar, ≈ approximately the same. Writing numbers: comma ',' - as a thousands separator, point '.' as a decimal mark.

Page 3

'Percent (%)' means 'out of one hundred':

1.3% = 1.3 'out of one hundred',

p% is read p 'percent',

1.3% = 1.3/100 = 1.3 ÷ 100

1.3% of 1,300 = ?

... is equivalent to multiplying them:

1.3% × 1,300 = ?

1.3% × 1,300 =

1.3/100 × 1,300 =

(1.3 ÷ 100) × 1,300 =

1.3 × 1,300 ÷ 100 =

1,690 ÷ 100 =

16.9

If 1.3% × 1,300 = 16.9 =>

Divide 16.9 by 1,300...

... And see if we get as a result: 1.3%

100/100 = 100 ÷ 100 = 100% = 1

Multiply a number by the fraction 100/100,
... and its value doesn't change.

n/100 = n%, for any number.

16.9 ÷ 1,300 =

0.013 =

0.013 × 100/100 =

(0.013 × 100)/100 =

1.3/100 =

1.3%

The symbols used: % percent, ÷ division, × multiplication, = the equal sign, / the fraction bar, ≈ approximately the same. Writing numbers: comma ',' - as a thousands separator, point '.' as a decimal mark.

Page 4

'Percent (%)' means 'out of one hundred':

844% = 844 'out of one hundred',

p% is read p 'percent',

844% = 844/100 = 844 ÷ 100

844% of 1.25 = ?

... is equivalent to multiplying them:

844% × 1.25 = ?

844% × 1.25 =

844/100 × 1.25 =

(844 ÷ 100) × 1.25 =

844 × 1.25 ÷ 100 =

1,055 ÷ 100 =

10.55

If 844% × 1.25 = 10.55 =>

Divide 10.55 by 1.25...

... And see if we get as a result: 844%

100/100 = 100 ÷ 100 = 100% = 1

Multiply a number by the fraction 100/100,
... and its value doesn't change.

n/100 = n%, for any number.

10.55 ÷ 1.25 =

8.44 =

8.44 × 100/100 =

(8.44 × 100)/100 =

844/100 =

844%

The symbols used: % percent, ÷ division, × multiplication, = the equal sign, / the fraction bar, ≈ approximately the same. Writing numbers: comma ',' - as a thousands separator, point '.' as a decimal mark.