Subtract 9/40 from 8/15
8/15 - 9/40 is 37/120.
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,
9/40 = 9 × 3/40 × 3 = 27/120 - Subtract the two like fractions:
64/120 - 27/120 = 64 - 27/120 = 37/120
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/15-9/40 8/15-18/40 8/30-9/40 8/15-9/80 24/15-9/40 8/15-27/40 8/45-9/40 40/15-9/40 8/15-45/40 8/75-9/40 56/15-9/40 8/15-63/40