Answers

Subtract 40/7 from 90/27

1^st number: 3 9/27, 2^nd number: 5 5/7

90/27 - 40/7 is -50/21.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 27 and 7 is 189
   
   Next, find the equivalent fraction of both fractional numbers with denominator 189
2. For the 1st fraction, since 27 × 7 = 189,
   90/27 = 90 × 7/27 × 7 = 630/189
3. Likewise, for the 2nd fraction, since 7 × 27 = 189,
   40/7 = 40 × 27/7 × 27 = 1080/189
4. Subtract the two like fractions:
   630/189 - 1080/189 = 630 - 1080/189 = -450/189
5. After reducing the fraction, the answer is -50/21

MathStep (Works offline)

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

Related: ⁹⁰/₂₇-⁸⁰/₇ ⁹⁰/₅₄-⁴⁰/₇ ⁹⁰/₂₇-⁴⁰/₁₄ ⁹⁰/₈₁-⁴⁰/₇ ⁹⁰/₂₇-⁴⁰/₂₁ ⁹⁰/₂₇-⁴⁰/₃₅ ⁹⁰/₂₇-⁴⁰/₄₉

Subtract Fractions Calculator