Answers

Subtract 50/81 from 49/80

49/80 - 50/81 is -31/6480.

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,
   49/80 = 49 × 81/80 × 81 = 3969/6480
3. Likewise, for the 2nd fraction, since 81 × 80 = 6480,
   50/81 = 50 × 80/81 × 80 = 4000/6480
4. Subtract the two like fractions:
   3969/6480 - 4000/6480 = 3969 - 4000/6480 = -31/6480

MathStep (Works offline)

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

Related: ⁹⁸/₈₀-⁵⁰/₈₁

Subtract Fractions Calculator