Subtract 16/63 from 21/15
1st number: 1 6/15, 2nd number: 16/63
21/15 - 16/63 is 361/315.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 63 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 15 × 21 = 315,
21/15 = 21 × 21/15 × 21 = 441/315 - Likewise, for the 2nd fraction, since 63 × 5 = 315,
16/63 = 16 × 5/63 × 5 = 80/315 - Subtract the two like fractions:
441/315 - 80/315 = 441 - 80/315 = 361/315 - In mixed form: 146/315
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/15-16/63 21/15-32/63 21/30-16/63 63/15-16/63 21/15-48/63 21/45-16/63 21/15-80/63 21/75-16/63