Answers

Subtract 42/30 from 10/42

1^st number: 10/42, 2^nd number: 1 12/30

10/42 - 42/30 is -122/105.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 42 and 30 is 210
2. For the 1st fraction, since 42 × 5 = 210,
   10/42 = 10 × 5/42 × 5 = 50/210
3. Likewise, for the 2nd fraction, since 30 × 7 = 210,
   42/30 = 42 × 7/30 × 7 = 294/210
4. Subtract the two fractions:
   50/210 - 294/210 = 50 - 294/210 = -244/210
5. After reducing the fraction, the answer is -122/105

MathStep (Works offline)

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

Related: ²⁰/₄₂-⁴²/₃₀ ¹⁰/₄₂-⁸⁴/₃₀ ¹⁰/₈₄-⁴²/₃₀ ¹⁰/₄₂-⁴²/₆₀ ³⁰/₄₂-⁴²/₃₀ ¹⁰/₄₂-⁴²/₉₀ ⁵⁰/₄₂-⁴²/₃₀ ⁷⁰/₄₂-⁴²/₃₀

Subtract Fractions Calculator