Subtract 3/15 from 12/63
12/63 - 3/15 is -1/105.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 15 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 63 × 5 = 315,
12/63 = 12 × 5/63 × 5 = 60/315 - Likewise, for the 2nd fraction, since 15 × 21 = 315,
3/15 = 3 × 21/15 × 21 = 63/315 - Subtract the two like fractions:
60/315 - 63/315 = 60 - 63/315 = -3/315 - After reducing the fraction, the answer is -1/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/63-3/15 12/63-6/15 12/63-3/30 36/63-3/15 12/63-9/15 12/63-3/45 60/63-3/15 12/63-3/75 84/63-3/15 12/63-21/15