15/3 divided by 21/4

15/3 ÷ 21/4
=
20 21
Decimal: 0.952381
Percentage: 95.24%

Step-by-Step Solution

  1. 1
    Take reciprocal of second fraction
    21/4 becomes 4/21
  2. 2
    Multiply by reciprocal
    15/3 × 4/21
  3. 3
    Multiply numerators & denominators
    15 × 4 = 60    3 × 21 = 63
  4. 4
    Simplify
    60/63 = 20/21

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.

Try Another Calculation