Answers

Subtract 7/9 from 9/42

9/42 - 7/9 is -71/126.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 42 and 9 is 126
   
   Next, find the equivalent fraction of both fractional numbers with denominator 126
2. For the 1st fraction, since 42 × 3 = 126,
   9/42 = 9 × 3/42 × 3 = 27/126
3. Likewise, for the 2nd fraction, since 9 × 14 = 126,
   7/9 = 7 × 14/9 × 14 = 98/126
4. Subtract the two like fractions:
   27/126 - 98/126 = 27 - 98/126 = -71/126

MathStep (Works offline)

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

Related: ¹⁸/₄₂-⁷/₉ ⁹/₄₂-¹⁴/₉ ⁹/₈₄-⁷/₉ ⁹/₄₂-⁷/₁₈ ²⁷/₄₂-⁷/₉ ⁹/₄₂-²¹/₉ ⁹/₄₂-⁷/₂₇ ⁴⁵/₄₂-⁷/₉ ⁹/₄₂-³⁵/₉ ⁹/₄₂-⁷/₄₅ ⁶³/₄₂-⁷/₉ ⁹/₄₂-⁴⁹/₉ ⁹/₄₂-⁷/₆₃

Subtract Fractions Calculator