Subtract 54/21 from 27/64
1st number: 27/64, 2nd number: 2 12/21
27/64 - 54/21 is -963/448.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 64 and 21 is 1344
Next, find the equivalent fraction of both fractional numbers with denominator 1344 - For the 1st fraction, since 64 × 21 = 1344,
27/64 = 27 × 21/64 × 21 = 567/1344 - Likewise, for the 2nd fraction, since 21 × 64 = 1344,
54/21 = 54 × 64/21 × 64 = 3456/1344 - Subtract the two like fractions:
567/1344 - 3456/1344 = 567 - 3456/1344 = -2889/1344 - After reducing the fraction, the answer is -963/448
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/64-54/21 27/64-54/42 81/64-54/21 27/64-54/63