Subtract 20/63 from 4/15
4/15 - 20/63 is -16/315.
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,
4/15 = 4 × 21/15 × 21 = 84/315 - Likewise, for the 2nd fraction, since 63 × 5 = 315,
20/63 = 20 × 5/63 × 5 = 100/315 - Subtract the two like fractions:
84/315 - 100/315 = 84 - 100/315 = -16/315
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/15-20/63 4/15-40/63 4/30-20/63 12/15-20/63 4/15-60/63 4/45-20/63 20/15-20/63 4/75-20/63 28/15-20/63