Answers

Subtract 81/7 from 27/80

1^st number: 27/80, 2^nd number: 11 4/7

27/80 - 81/7 is -6291/560.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 80 and 7 is 560
   
   Next, find the equivalent fraction of both fractional numbers with denominator 560
2. For the 1st fraction, since 80 × 7 = 560,
   27/80 = 27 × 7/80 × 7 = 189/560
3. Likewise, for the 2nd fraction, since 7 × 80 = 560,
   81/7 = 81 × 80/7 × 80 = 6480/560
4. Subtract the two like fractions:
   189/560 - 6480/560 = 189 - 6480/560 = -6291/560

MathStep (Works offline)

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

Related: ⁵⁴/₈₀-⁸¹/₇ ²⁷/₈₀-⁸¹/₁₄ ⁸¹/₈₀-⁸¹/₇ ²⁷/₈₀-⁸¹/₂₁ ²⁷/₈₀-⁸¹/₃₅ ²⁷/₈₀-⁸¹/₄₉

Subtract Fractions Calculator