Subtract 81/16 from 15/7
1st number: 2 1/7, 2nd number: 5 1/16
15/7 - 81/16 is -327/112.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 16 is 112
Next, find the equivalent fraction of both fractional numbers with denominator 112 - For the 1st fraction, since 7 × 16 = 112,
15/7 = 15 × 16/7 × 16 = 240/112 - Likewise, for the 2nd fraction, since 16 × 7 = 112,
81/16 = 81 × 7/16 × 7 = 567/112 - Subtract the two like fractions:
240/112 - 567/112 = 240 - 567/112 = -327/112
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/7-81/16 15/14-81/16 15/7-81/32 45/7-81/16 15/21-81/16 15/7-81/48 75/7-81/16 15/35-81/16 15/7-81/80 15/49-81/16