Subtract 81/16 from 10/72
1st number: 10/72, 2nd number: 5 1/16
10/72 - 81/16 is -709/144.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 16 is 144
Next, find the equivalent fraction of both fractional numbers with denominator 144 - For the 1st fraction, since 72 × 2 = 144,
10/72 = 10 × 2/72 × 2 = 20/144 - Likewise, for the 2nd fraction, since 16 × 9 = 144,
81/16 = 81 × 9/16 × 9 = 729/144 - Subtract the two like fractions:
20/144 - 729/144 = 20 - 729/144 = -709/144
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/72-81/16 10/72-81/32 30/72-81/16 10/72-81/48 50/72-81/16 10/72-81/80 70/72-81/16