12/4 divided by 21/4

12/4 ÷ 21/4
=
4 7
Decimal: 0.571429
Percentage: 57.14%

Step-by-Step Solution

  1. 1
    Take reciprocal of second fraction
    21/4 becomes 4/21
  2. 2
    Multiply by reciprocal
    12/4 × 4/21
  3. 3
    Multiply numerators & denominators
    12 × 4 = 48    4 × 21 = 84
  4. 4
    Simplify
    48/84 = 4/7

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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