Answers

Subtract 27/60 from 5/21

5/21 - 27/60 is -89/420.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 60 is 420
   
   Next, find the equivalent fraction of both fractional numbers with denominator 420
2. For the 1st fraction, since 21 × 20 = 420,
   5/21 = 5 × 20/21 × 20 = 100/420
3. Likewise, for the 2nd fraction, since 60 × 7 = 420,
   27/60 = 27 × 7/60 × 7 = 189/420
4. Subtract the two like fractions:
   100/420 - 189/420 = 100 - 189/420 = -89/420

MathStep (Works offline)

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

Related: ¹⁰/₂₁-²⁷/₆₀ ⁵/₂₁-⁵⁴/₆₀ ⁵/₄₂-²⁷/₆₀ ¹⁵/₂₁-²⁷/₆₀ ⁵/₂₁-⁸¹/₆₀ ⁵/₆₃-²⁷/₆₀ ²⁵/₂₁-²⁷/₆₀ ³⁵/₂₁-²⁷/₆₀

Subtract Fractions Calculator