Q:

What is 21/100 as a decimal?

Accepted Solution

A:
Solution: 21/100 as a decimal is 0.21MethodsMethod 1 – Explanation using the division method:Put in a nutshell, a fraction is written in terms of two parts separated by a line in between: the number above the line is called the numerator and the number below the line is called the denominator. To solve this question, we can use the division method to get a decimal: simply divide the numerator 21 by the denominator 100 to get the decimal:21 (numerator) ÷ 100 (denominator) = 0.21That’s it! When you convert 21/100 to a decimal, 0.21 is your answer.Method 2 – Explanation using the factors of 10 method:Another method is to change the denominator to a power of 10 (like 10, 100, 1000 etc.). This way, the fraction will be coming simpler to compute.Even if our denominator is not a power of 10, we can make it one. If the denominator is a factor of a power of 10, like 2, 4, 5, 8, 10, 16, 20, 25, 40, 50 and so on, then we can convert them into a power of 10. Since our denominator is 100, we can convert it because it is a factor of a power of 10.To do that, we multiply 100 by 1 to make the denominator 100. And since we multiplied the denominator by 1, we also need to multiply the numerator by 1 too:21∗1100∗1=21100=0.21\frac{21 * 1}{100 * 1} = \frac{21}{100} = 0.21100∗121∗1​=10021​=0.21And finally, you get 0.21 as your answer when you convert 21/100 to a decimal.Master fraction to decimal conversionsIf this problem was a little difficult or you want to practice your skills on another one, give it a go on any one of these too!What is 81/89 as a decimal?What is 47/60 as a decimal?What is 114/29 as a decimal?What is 13/5 as a decimal?