Subtract 21/64 from 12/5
1st number: 2 2/5, 2nd number: 21/64
12/5 - 21/64 is 663/320.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 64 is 320
Next, find the equivalent fraction of both fractional numbers with denominator 320 - For the 1st fraction, since 5 × 64 = 320,
12/5 = 12 × 64/5 × 64 = 768/320 - Likewise, for the 2nd fraction, since 64 × 5 = 320,
21/64 = 21 × 5/64 × 5 = 105/320 - Subtract the two like fractions:
768/320 - 105/320 = 768 - 105/320 = 663/320 - In mixed form: 223/320
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/5-21/64 12/5-42/64 12/10-21/64 36/5-21/64 12/5-63/64 12/15-21/64 60/5-21/64 12/25-21/64 84/5-21/64 12/35-21/64