21/2 divided by 40/4

21/2 ÷ 40/4
=
21 20
Mixed Number: 1 1/20
Decimal: 1.05
Percentage: 105%

Step-by-Step Solution

  1. 1
    Take reciprocal of second fraction
    40/4 becomes 4/40
  2. 2
    Multiply by reciprocal
    21/2 × 4/40
  3. 3
    Multiply numerators & denominators
    21 × 4 = 84    2 × 40 = 80
  4. 4
    Simplify
    84/80 = 21/20

How to Divide Fractions

To divide fractions, use "Keep, Change, Flip": keep the first fraction unchanged, change the ÷ to ×, then flip the second fraction. Multiply and simplify.

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