Answers

Subtract 72/35 from 5/21

1^st number: 5/21, 2^nd number: 2 2/35

5/21 - 72/35 is -191/105.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 35 is 105
   
   Next, find the equivalent fraction of both fractional numbers with denominator 105
2. For the 1st fraction, since 21 × 5 = 105,
   5/21 = 5 × 5/21 × 5 = 25/105
3. Likewise, for the 2nd fraction, since 35 × 3 = 105,
   72/35 = 72 × 3/35 × 3 = 216/105
4. Subtract the two like fractions:
   25/105 - 216/105 = 25 - 216/105 = -191/105

MathStep (Works offline)

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

Related: ¹⁰/₂₁-⁷²/₃₅ ⁵/₄₂-⁷²/₃₅ ⁵/₂₁-⁷²/₇₀ ¹⁵/₂₁-⁷²/₃₅ ⁵/₆₃-⁷²/₃₅ ²⁵/₂₁-⁷²/₃₅ ³⁵/₂₁-⁷²/₃₅

Subtract Fractions Calculator