How to convert 21 4/8 to a decimal number?

Some mixed numbers, such as 21 4/8, represent a value that can also be expressed as a decimal (which can make certain calculations and comparisons easier to perform).

Step-by-step conversion of 21 4/8 to a decimal number

  1. Multiply the whole number by the denominator: 21 × 8 = 168
  2. Add this result to the numerator: 168 + 4 = 172
  3. Divide the previous result by the denominator: 172 ÷ 8 = 21.5

So the mixed number 21 4 8 as a decimal is 21.5.

Please note that you can also express this result as a fraction by simplifying 172/8 = 43/2.