# Steps on How to Calculate the Percentage of Two Numbers

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129 In mathematics, a percentage is a ratio presented as a fraction in terms of 100. It is often expressed using the percentage sign, “%,” or sometimes as “pct.” A percentage is a dimensionless number (pure number) with no measurement unit. Finding the percentage of two numbers is easy and only requires simple math. If you need to know how to calculate the percentages of two numbers, follow these steps.

## 1) Determine the whole:

The first step in finding a percentage is to determine the whole that you measure against. In almost all cases, this will simply be 100%, which represents the entirety of the field being considered. You can express this as either 100 or 1.00.

## 2) Convert your decimal fractions to percentages:

You will almost certainly need to convert decimal fractions into percentages. This process is incredibly easy; multiply your decimal by 100%. For example, if you wanted to know what 20% of 64 is, you would first convert 20% into a decimal by moving the decimal point two places to the left. This gives you 0.20. You would then multiply 0.20 by 64 to get 12.8 (rounded up from 12.8333…).

## 3) Find the desired value:

The last step is simply solving for your desired value—in this instance, finding out what 20% of 64 is—using basic algebraic principles. In other words, set up an equation with what you know and solve for what you don’t know! In this problem, we know that 20% = 0.20 = 12.8/64; thus, x = 12.8/0.20 = 64*.20 = 12.8 (where * represents multiplication).