Answers

Subtract 36/49 from 81/80

1^st number: 1 1/80, 2^nd number: 36/49

81/80 - 36/49 is 1089/3920.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 80 and 49 is 3920
   
   Next, find the equivalent fraction of both fractional numbers with denominator 3920
2. For the 1st fraction, since 80 × 49 = 3920,
   81/80 = 81 × 49/80 × 49 = 3969/3920
3. Likewise, for the 2nd fraction, since 49 × 80 = 3920,
   36/49 = 36 × 80/49 × 80 = 2880/3920
4. Subtract the two like fractions:
   3969/3920 - 2880/3920 = 3969 - 2880/3920 = 1089/3920

MathStep (Works offline)

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

Related: ⁸¹/₈₀-⁷²/₄₉ ⁸¹/₈₀-³⁶/₉₈

Subtract Fractions Calculator