Answers

Subtract 7/10 from 50/81

50/81 - 7/10 is -67/810.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 81 and 10 is 810
   
   Next, find the equivalent fraction of both fractional numbers with denominator 810
2. For the 1st fraction, since 81 × 10 = 810,
   50/81 = 50 × 10/81 × 10 = 500/810
3. Likewise, for the 2nd fraction, since 10 × 81 = 810,
   7/10 = 7 × 81/10 × 81 = 567/810
4. Subtract the two like fractions:
   500/810 - 567/810 = 500 - 567/810 = -67/810

MathStep (Works offline)

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

Related: ⁵⁰/₈₁-¹⁴/₁₀ ⁵⁰/₈₁-⁷/₂₀ ⁵⁰/₈₁-²¹/₁₀ ⁵⁰/₈₁-⁷/₃₀ ⁵⁰/₈₁-³⁵/₁₀ ⁵⁰/₈₁-⁷/₅₀ ⁵⁰/₈₁-⁴⁹/₁₀ ⁵⁰/₈₁-⁷/₇₀

Subtract Fractions Calculator