Answers

Subtract 98/81 from 54/80

1^st number: 54/80, 2^nd number: 1 17/81

54/80 - 98/81 is -1733/3240.

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,
   54/80 = 54 × 81/80 × 81 = 4374/6480
3. Likewise, for the 2nd fraction, since 81 × 80 = 6480,
   98/81 = 98 × 80/81 × 80 = 7840/6480
4. Subtract the two like fractions:
   4374/6480 - 7840/6480 = 4374 - 7840/6480 = -3466/6480
5. After reducing the fraction, the answer is -1733/3240

MathStep (Works offline)

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

Related:

Subtract Fractions Calculator