Answers

Subtract 80/7 from 90/84

1^st number: 1 6/84, 2^nd number: 11 3/7

90/84 - 80/7 is -145/14.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 84 and 7 is 84
   
   Next, find the equivalent fraction of both fractional numbers with denominator 84
2. For the 1st fraction, since 84 × 1 = 84,
   90/84 = 90 × 1/84 × 1 = 90/84
3. Likewise, for the 2nd fraction, since 7 × 12 = 84,
   80/7 = 80 × 12/7 × 12 = 960/84
4. Subtract the two like fractions:
   90/84 - 960/84 = 90 - 960/84 = -870/84
5. After reducing the fraction, the answer is -145/14

MathStep (Works offline)

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

Related: ⁹⁰/₈₄-⁸⁰/₁₄ ⁹⁰/₈₄-⁸⁰/₂₁ ⁹⁰/₈₄-⁸⁰/₃₅ ⁹⁰/₈₄-⁸⁰/₄₉

Subtract Fractions Calculator