Subtract 30/64 from 21/12
1st number: 1 9/12, 2nd number: 30/64
21/12 - 30/64 is 41/32.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 64 is 192
Next, find the equivalent fraction of both fractional numbers with denominator 192 - For the 1st fraction, since 12 × 16 = 192,
21/12 = 21 × 16/12 × 16 = 336/192 - Likewise, for the 2nd fraction, since 64 × 3 = 192,
30/64 = 30 × 3/64 × 3 = 90/192 - Subtract the two like fractions:
336/192 - 90/192 = 336 - 90/192 = 246/192 - After reducing the fraction, the answer is 41/32
- In mixed form: 19/32
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/12-30/64 21/12-60/64 21/24-30/64 63/12-30/64 21/12-90/64 21/36-30/64 21/60-30/64 21/84-30/64