21/4 divided by 42/5

21/4 ÷ 42/5
=
5 8
Decimal: 0.625
Percentage: 62.5%

Step-by-Step Solution

  1. 1
    Take reciprocal of second fraction
    42/5 becomes 5/42
  2. 2
    Multiply by reciprocal
    21/4 × 5/42
  3. 3
    Multiply numerators & denominators
    21 × 5 = 105    4 × 42 = 168
  4. 4
    Simplify
    105/168 = 5/8

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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