Subtract 30/64 from 21/3
1st number: 7 0/3, 2nd number: 30/64
21/3 - 30/64 is 209/32.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 64 is 192
Next, find the equivalent fraction of both fractional numbers with denominator 192 - For the 1st fraction, since 3 × 64 = 192,
21/3 = 21 × 64/3 × 64 = 1344/192 - Likewise, for the 2nd fraction, since 64 × 3 = 192,
30/64 = 30 × 3/64 × 3 = 90/192 - Subtract the two like fractions:
1344/192 - 90/192 = 1344 - 90/192 = 1254/192 - After reducing the fraction, the answer is 209/32
- In mixed form: 617/32
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/3-30/64 21/3-60/64 21/6-30/64 63/3-30/64 21/3-90/64 21/9-30/64 21/15-30/64