Subtract 49/40 from 8/15
1st number: 8/15, 2nd number: 1 9/40
8/15 - 49/40 is -83/120.
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,
8/15 = 8 × 8/15 × 8 = 64/120 - Likewise, for the 2nd fraction, since 40 × 3 = 120,
49/40 = 49 × 3/40 × 3 = 147/120 - Subtract the two like fractions:
64/120 - 147/120 = 64 - 147/120 = -83/120
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/15-49/40 8/15-98/40 8/30-49/40 8/15-49/80 24/15-49/40 8/45-49/40 40/15-49/40 8/75-49/40 56/15-49/40