Answers

Subtract 72/24 from 18/84

1^st number: 18/84, 2^nd number: 3 0/24

18/84 - 72/24 is -39/14.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 84 and 24 is 168
   
   Next, find the equivalent fraction of both fractional numbers with denominator 168
2. For the 1st fraction, since 84 × 2 = 168,
   18/84 = 18 × 2/84 × 2 = 36/168
3. Likewise, for the 2nd fraction, since 24 × 7 = 168,
   72/24 = 72 × 7/24 × 7 = 504/168
4. Subtract the two like fractions:
   36/168 - 504/168 = 36 - 504/168 = -468/168
5. After reducing the fraction, the answer is -39/14

MathStep (Works offline)

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

Related: ³⁶/₈₄-⁷²/₂₄ ¹⁸/₈₄-⁷²/₄₈ ⁵⁴/₈₄-⁷²/₂₄ ⁹⁰/₈₄-⁷²/₂₄

Subtract Fractions Calculator