Answers

Subtract 42/56 from 72/18

1^st number: 4 0/18, 2^nd number: 42/56

72/18 - 42/56 is 13/4.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 18 and 56 is 504
   
   Next, find the equivalent fraction of both fractional numbers with denominator 504
2. For the 1st fraction, since 18 × 28 = 504,
   72/18 = 72 × 28/18 × 28 = 2016/504
3. Likewise, for the 2nd fraction, since 56 × 9 = 504,
   42/56 = 42 × 9/56 × 9 = 378/504
4. Subtract the two like fractions:
   2016/504 - 378/504 = 2016 - 378/504 = 1638/504
5. After reducing the fraction, the answer is 13/4
6. In mixed form: 31/4

MathStep (Works offline)

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

Related: ⁷²/₁₈-⁸⁴/₅₆ ⁷²/₃₆-⁴²/₅₆ ⁷²/₅₄-⁴²/₅₆ ⁷²/₉₀-⁴²/₅₆

Subtract Fractions Calculator