Subtract 9/64 from 9/21
9/21 - 9/64 is 129/448.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 64 is 1344
Next, find the equivalent fraction of both fractional numbers with denominator 1344 - For the 1st fraction, since 21 × 64 = 1344,
9/21 = 9 × 64/21 × 64 = 576/1344 - Likewise, for the 2nd fraction, since 64 × 21 = 1344,
9/64 = 9 × 21/64 × 21 = 189/1344 - Subtract the two like fractions:
576/1344 - 189/1344 = 576 - 189/1344 = 387/1344 - After reducing the fraction, the answer is 129/448
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/21-9/64 9/21-18/64 9/42-9/64 27/21-9/64 9/21-27/64 9/63-9/64 45/21-9/64 9/21-45/64 63/21-9/64 9/21-63/64