Subtract 21/72 from 10/16
10/16 - 21/72 is 1/3.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 16 and 72 is 144
Next, find the equivalent fraction of both fractional numbers with denominator 144 - For the 1st fraction, since 16 × 9 = 144,
10/16 = 10 × 9/16 × 9 = 90/144 - Likewise, for the 2nd fraction, since 72 × 2 = 144,
21/72 = 21 × 2/72 × 2 = 42/144 - Subtract the two like fractions:
90/144 - 42/144 = 90 - 42/144 = 48/144 - After reducing the fraction, the answer is 1/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/16-21/72 10/16-42/72 10/32-21/72 30/16-21/72 10/16-63/72 10/48-21/72 50/16-21/72 10/80-21/72 70/16-21/72