Subtract 1/64 from 21/84
21/84 - 1/64 is 15/64.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 64 is 1344
Next, find the equivalent fraction of both fractional numbers with denominator 1344 - For the 1st fraction, since 84 × 16 = 1344,
21/84 = 21 × 16/84 × 16 = 336/1344 - Likewise, for the 2nd fraction, since 64 × 21 = 1344,
1/64 = 1 × 21/64 × 21 = 21/1344 - Subtract the two like fractions:
336/1344 - 21/1344 = 336 - 21/1344 = 315/1344 - After reducing the fraction, the answer is 15/64
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/84-1/64 21/84-2/64 63/84-1/64 21/84-3/64 21/84-5/64 21/84-7/64