Answers

Subtract 21/12 from 60/90

1^st number: 60/90, 2^nd number: 1 9/12

60/90 - 21/12 is -13/12.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 90 and 12 is 180
   
   Next, find the equivalent fraction of both fractional numbers with denominator 180
2. For the 1st fraction, since 90 × 2 = 180,
   60/90 = 60 × 2/90 × 2 = 120/180
3. Likewise, for the 2nd fraction, since 12 × 15 = 180,
   21/12 = 21 × 15/12 × 15 = 315/180
4. Subtract the two like fractions:
   120/180 - 315/180 = 120 - 315/180 = -195/180
5. After reducing the fraction, the answer is -13/12

MathStep (Works offline)

Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad

Related: ⁶⁰/₉₀-⁴²/₁₂ ⁶⁰/₉₀-²¹/₂₄ ⁶⁰/₉₀-⁶³/₁₂ ⁶⁰/₉₀-²¹/₃₆ ⁶⁰/₉₀-²¹/₆₀ ⁶⁰/₉₀-²¹/₈₄

Subtract Fractions Calculator