Subtract 63/40 from 9/15
1st number: 9/15, 2nd number: 1 23/40
9/15 - 63/40 is -39/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 40 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 15 × 8 = 120,
9/15 = 9 × 8/15 × 8 = 72/120 - Likewise, for the 2nd fraction, since 40 × 3 = 120,
63/40 = 63 × 3/40 × 3 = 189/120 - Subtract the two like fractions:
72/120 - 189/120 = 72 - 189/120 = -117/120 - After reducing the fraction, the answer is -39/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/15-63/40 9/30-63/40 9/15-63/80 27/15-63/40 9/45-63/40 45/15-63/40 9/75-63/40 63/15-63/40