Answers

Subtract 10/27 from 42/81

42/81 - 10/27 is 4/27.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 81 and 27 is 81
   
   Next, find the equivalent fraction of both fractional numbers with denominator 81
2. For the 1st fraction, since 81 × 1 = 81,
   42/81 = 42 × 1/81 × 1 = 42/81
3. Likewise, for the 2nd fraction, since 27 × 3 = 81,
   10/27 = 10 × 3/27 × 3 = 30/81
4. Subtract the two like fractions:
   42/81 - 30/81 = 42 - 30/81 = 12/81
5. After reducing the fraction, the answer is 4/27

MathStep (Works offline)

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

Related: ⁸⁴/₈₁-¹⁰/₂₇ ⁴²/₈₁-²⁰/₂₇ ⁴²/₈₁-¹⁰/₅₄ ⁴²/₈₁-³⁰/₂₇ ⁴²/₈₁-¹⁰/₈₁ ⁴²/₈₁-⁵⁰/₂₇ ⁴²/₈₁-⁷⁰/₂₇

Subtract Fractions Calculator