Answers

Subtract 42/4 from 72/8

1^st number: 9 0/8, 2^nd number: 10 2/4

72/8 - 42/4 is -3/2.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 8 and 4 is 8
   
   Next, find the equivalent fraction of both fractional numbers with denominator 8
2. For the 1st fraction, since 8 × 1 = 8,
   72/8 = 72 × 1/8 × 1 = 72/8
3. Likewise, for the 2nd fraction, since 4 × 2 = 8,
   42/4 = 42 × 2/4 × 2 = 84/8
4. Subtract the two like fractions:
   72/8 - 84/8 = 72 - 84/8 = -12/8
5. After reducing the fraction, the answer is -3/2

MathStep (Works offline)

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

Related: ⁷²/₈-⁸⁴/₄ ⁷²/₁₆-⁴²/₄ ⁷²/₈-⁴²/₈ ⁷²/₂₄-⁴²/₄ ⁷²/₈-⁴²/₁₂ ⁷²/₄₀-⁴²/₄ ⁷²/₈-⁴²/₂₀ ⁷²/₅₆-⁴²/₄ ⁷²/₈-⁴²/₂₈

Subtract Fractions Calculator