Subtract 21/16 from 15/9
1st number: 1 6/9, 2nd number: 1 5/16
15/9 - 21/16 is 17/48.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 16 is 144
Next, find the equivalent fraction of both fractional numbers with denominator 144 - For the 1st fraction, since 9 × 16 = 144,
15/9 = 15 × 16/9 × 16 = 240/144 - Likewise, for the 2nd fraction, since 16 × 9 = 144,
21/16 = 21 × 9/16 × 9 = 189/144 - Subtract the two like fractions:
240/144 - 189/144 = 240 - 189/144 = 51/144 - After reducing the fraction, the answer is 17/48
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/9-21/16 15/9-42/16 15/18-21/16 15/9-21/32 45/9-21/16 15/9-63/16 15/27-21/16 15/9-21/48 75/9-21/16 15/45-21/16 15/9-21/80 15/63-21/16