Subtract 63/20 from 18/15
1st number: 1 3/15, 2nd number: 3 3/20
18/15 - 63/20 is -39/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 20 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 15 × 4 = 60,
18/15 = 18 × 4/15 × 4 = 72/60 - Likewise, for the 2nd fraction, since 20 × 3 = 60,
63/20 = 63 × 3/20 × 3 = 189/60 - Subtract the two like fractions:
72/60 - 189/60 = 72 - 189/60 = -117/60 - After reducing the fraction, the answer is -39/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/15-63/20 18/30-63/20 18/15-63/40 54/15-63/20 18/45-63/20 18/15-63/60 90/15-63/20 18/75-63/20