0.21 is 21/100 as a fraction
How to convert decimals as fractions
What are fraction ?
Word “fraction” is derived from the Latin word fractus. It simply means how many parts of a whole we have. A fraction consists of a numerator, a slash and denominator. For example in the fraction 3/4, 3 is the numerator and 4 is the denominator.
Steps to convert 0.21 to fraction ?
Steps:
Step 1:
Write down the decimal divided by 1, like this:
decimal
1
Step 2:
Multiply both top and bottom by 10 for every number after the decimal point. (For
example,
if there are two numbers after the decimal point, then use 100, if there are three then use 1000, etc.)
Step 3:
Simplify (or reduce) the fraction
Example: Convert 0.21 to a fraction
Step 1:
Write down 0.21 divided by 1:
0.21 1
Step 2:
Multiply both top and bottom by 100 (because there are 2 digits after the decimal
point so that is
100:
| × 100 | ||
 |
||
| 0.21 1 | = | 21 100 |
 |
||
| × 100 | ||
(Do you see how it turns the top number into a whole number?)
Step 3:
Simplify the Fraction:
| ÷1 | ||
|
||
| 21 100 | = | 21 100 |
|
||
| ÷1 | ||
Answer = 21 100
Note: 21/100 is called a decimal fraction and 21/100 is called a common fraction !
How to read a fraction?
The simplest way to read fractions is to simply read them as numerator over denominator. Example, fraction 5/8 can be read as five over eight.
Example of fractions in real life - 1
Lets say in a school of 100 students, there are 21 boys and remaining are girls. We can then simply say the the fraction of boys in this school are 21/100 and ratio of boys to total students is 0.21
