Answers

Subtract 50/54 from 72/42

1^st number: 1 30/42, 2^nd number: 50/54

72/42 - 50/54 is 149/189.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 42 and 54 is 378
   
   Next, find the equivalent fraction of both fractional numbers with denominator 378
2. For the 1st fraction, since 42 × 9 = 378,
   72/42 = 72 × 9/42 × 9 = 648/378
3. Likewise, for the 2nd fraction, since 54 × 7 = 378,
   50/54 = 50 × 7/54 × 7 = 350/378
4. Subtract the two like fractions:
   648/378 - 350/378 = 648 - 350/378 = 298/378
5. After reducing the fraction, the answer is 149/189

MathStep (Works offline)

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

Related: ⁷²/₈₄-⁵⁰/₅₄

Subtract Fractions Calculator