Answers

Subtract 2/81 from 28/80

28/80 - 2/81 is 527/1620.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 80 and 81 is 6480
   
   Next, find the equivalent fraction of both fractional numbers with denominator 6480
2. For the 1st fraction, since 80 × 81 = 6480,
   28/80 = 28 × 81/80 × 81 = 2268/6480
3. Likewise, for the 2nd fraction, since 81 × 80 = 6480,
   2/81 = 2 × 80/81 × 80 = 160/6480
4. Subtract the two like fractions:
   2268/6480 - 160/6480 = 2268 - 160/6480 = 2108/6480
5. After reducing the fraction, the answer is 527/1620

MathStep (Works offline)

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

Related: ⁵⁶/₈₀-²/₈₁ ²⁸/₈₀-⁴/₈₁ ⁸⁴/₈₀-²/₈₁ ²⁸/₈₀-⁶/₈₁ ²⁸/₈₀-¹⁰/₈₁ ²⁸/₈₀-¹⁴/₈₁

Subtract Fractions Calculator