How to Change a Decimal to a Percentage

In order to change a decimal into a percentage simply multiply the decimal by 100. For example, .45 x 100= 45. So the answer would be 45%. You may have noticed this already, but a simple way to multiply by 100 is to move the decimal two places to the right. For example the number .32. If you move the decimal one place you multiply by 10 and the number would be 3.2. Once more and it be comes 32, which you can add the % symbol to get your final answer of 32%.

Changing a Decimal to a Percentage

Changing a Decimal to a Percentage

Since a percent compares a number to 100, to convert a decimal to a percentage multiply by 100 percent. This is the same as moving the decimal point 2 places to the right.

Let’s look at a few examples. 65 hundredths. To change 65 hundredths into a percent, we’re going to multiply it times 100. 65 hundredths times 100 would move our decimal point 2 places to the right and give us 65 percent. 8 hundredths.

Again, to convert to a percent we’re going to multiply 8 hundredths times 100, which means we’re moving our decimal point 2 places to the right, which would give us 8 percent. The last one can sometimes be a little tricky.

Notice it doesn’t have 2 numbers behind the decimal, but of course it does because we can add an infinite number of 0s behind this 3. Let’s look at converting 3 tenths to a percentage.

Again, I’m going to take 3 tenths and multiply it times 100, so again, multiplying by 100 means I’m going to take my decimal point and move it 2 places to the right. That means I’m going to have to fill in with a 0, and I get 30 percent.



by Mometrix Test Preparation | Last Updated: June 3, 2020