Answers

Subtract 40/42 from 40/18

1^st number: 2 4/18, 2^nd number: 40/42

40/18 - 40/42 is 80/63.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 18 and 42 is 126
   
   Next, find the equivalent fraction of both fractional numbers with denominator 126
2. For the 1st fraction, since 18 × 7 = 126,
   40/18 = 40 × 7/18 × 7 = 280/126
3. Likewise, for the 2nd fraction, since 42 × 3 = 126,
   40/42 = 40 × 3/42 × 3 = 120/126
4. Subtract the two like fractions:
   280/126 - 120/126 = 280 - 120/126 = 160/126
5. After reducing the fraction, the answer is 80/63
6. In mixed form: 117/63

MathStep (Works offline)

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

Related: ⁸⁰/₁₈-⁴⁰/₄₂ ⁴⁰/₁₈-⁸⁰/₄₂ ⁴⁰/₃₆-⁴⁰/₄₂ ⁴⁰/₁₈-⁴⁰/₈₄ ⁴⁰/₅₄-⁴⁰/₄₂ ⁴⁰/₉₀-⁴⁰/₄₂

Subtract Fractions Calculator