How to convert 21 1/5 to a decimal number?

Some mixed numbers, such as 21 1/5, 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 1/5 to a decimal number

  1. Multiply the whole number by the denominator: 21 × 5 = 105
  2. Add this result to the numerator: 105 + 1 = 106
  3. Divide the previous result by the denominator: 106 ÷ 5 = 21.2

So the mixed number 21 1 5 as a decimal is 21.2.

Please note that you can also express this result as a fraction: 106/5.