Subtract 63/12 from 42/15
1st number: 2 12/15, 2nd number: 5 3/12
42/15 - 63/12 is -49/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 12 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 15 × 4 = 60,
42/15 = 42 × 4/15 × 4 = 168/60 - Likewise, for the 2nd fraction, since 12 × 5 = 60,
63/12 = 63 × 5/12 × 5 = 315/60 - Subtract the two like fractions:
168/60 - 315/60 = 168 - 315/60 = -147/60 - After reducing the fraction, the answer is -49/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/15-63/12 42/30-63/12 42/15-63/24 42/45-63/12 42/15-63/36 42/75-63/12 42/15-63/60 42/15-63/84