Answers

Subtract 35/84 from 12/21

12/21 - 35/84 is 13/84.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 84 is 84
   
   Next, find the equivalent fraction of both fractional numbers with denominator 84
2. For the 1st fraction, since 21 × 4 = 84,
   12/21 = 12 × 4/21 × 4 = 48/84
3. Likewise, for the 2nd fraction, since 84 × 1 = 84,
   35/84 = 35 × 1/84 × 1 = 35/84
4. Subtract the two like fractions:
   48/84 - 35/84 = 48 - 35/84 = 13/84

MathStep (Works offline)

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

Related: ²⁴/₂₁-³⁵/₈₄ ¹²/₂₁-⁷⁰/₈₄ ¹²/₄₂-³⁵/₈₄ ³⁶/₂₁-³⁵/₈₄ ¹²/₆₃-³⁵/₈₄ ⁶⁰/₂₁-³⁵/₈₄ ⁸⁴/₂₁-³⁵/₈₄

Subtract Fractions Calculator