Subtract 1/64 from 21/15
1st number: 1 6/15, 2nd number: 1/64
21/15 - 1/64 is 443/320.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 64 is 960
Next, find the equivalent fraction of both fractional numbers with denominator 960 - For the 1st fraction, since 15 × 64 = 960,
21/15 = 21 × 64/15 × 64 = 1344/960 - Likewise, for the 2nd fraction, since 64 × 15 = 960,
1/64 = 1 × 15/64 × 15 = 15/960 - Subtract the two like fractions:
1344/960 - 15/960 = 1344 - 15/960 = 1329/960 - After reducing the fraction, the answer is 443/320
- In mixed form: 1123/320
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/15-1/64 21/15-2/64 21/30-1/64 63/15-1/64 21/15-3/64 21/45-1/64 21/15-5/64 21/75-1/64 21/15-7/64