Answers

Subtract 40/14 from 20/90

1^st number: 20/90, 2^nd number: 2 12/14

20/90 - 40/14 is -166/63.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 90 and 14 is 630
   
   Next, find the equivalent fraction of both fractional numbers with denominator 630
2. For the 1st fraction, since 90 × 7 = 630,
   20/90 = 20 × 7/90 × 7 = 140/630
3. Likewise, for the 2nd fraction, since 14 × 45 = 630,
   40/14 = 40 × 45/14 × 45 = 1800/630
4. Subtract the two like fractions:
   140/630 - 1800/630 = 140 - 1800/630 = -1660/630
5. After reducing the fraction, the answer is -166/63

MathStep (Works offline)

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

Related: ⁴⁰/₉₀-⁴⁰/₁₄ ²⁰/₉₀-⁸⁰/₁₄ ²⁰/₉₀-⁴⁰/₂₈ ⁶⁰/₉₀-⁴⁰/₁₄ ²⁰/₉₀-⁴⁰/₄₂ ²⁰/₉₀-⁴⁰/₇₀ ²⁰/₉₀-⁴⁰/₉₈

Subtract Fractions Calculator