21/5 minus 9/6

21/5 − 9/6
=
27 10
Mixed Number: 2 7/10
Decimal: 2.7
Percentage: 270%

Step-by-Step Solution

  1. 1
    Find LCM of denominators
    LCM(5, 6) = 30
  2. 2
    Convert to common denominator
    21/5 = 126/30    9/6 = 45/30
  3. 3
    Subtract numerators
    126 − 45 = 81/30
  4. 4
    Simplify
    81/30 = 27/10

How to Subtract Fractions

Subtracting fractions follows the same process as addition. First find the LCM of the denominators, convert both fractions, then subtract the second numerator from the first. Simplify the answer.

Try Another Calculation