Answers

Subtract 49/81 from 25/20

1^st number: 1 5/20, 2^nd number: 49/81

25/20 - 49/81 is 209/324.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 81 is 1620
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1620
2. For the 1st fraction, since 20 × 81 = 1620,
   25/20 = 25 × 81/20 × 81 = 2025/1620
3. Likewise, for the 2nd fraction, since 81 × 20 = 1620,
   49/81 = 49 × 20/81 × 20 = 980/1620
4. Subtract the two like fractions:
   2025/1620 - 980/1620 = 2025 - 980/1620 = 1045/1620
5. After reducing the fraction, the answer is 209/324

MathStep (Works offline)

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

Related: ⁵⁰/₂₀-⁴⁹/₈₁ ²⁵/₂₀-⁹⁸/₈₁ ²⁵/₄₀-⁴⁹/₈₁ ⁷⁵/₂₀-⁴⁹/₈₁ ²⁵/₆₀-⁴⁹/₈₁

Subtract Fractions Calculator