Subtract 5/40 from 18/15
1st number: 1 3/15, 2nd number: 5/40
18/15 - 5/40 is 43/40.
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,
18/15 = 18 × 8/15 × 8 = 144/120 - Likewise, for the 2nd fraction, since 40 × 3 = 120,
5/40 = 5 × 3/40 × 3 = 15/120 - Subtract the two like fractions:
144/120 - 15/120 = 144 - 15/120 = 129/120 - After reducing the fraction, the answer is 43/40
- In mixed form: 13/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/15-5/40 18/15-10/40 18/30-5/40 18/15-5/80 54/15-5/40 18/15-15/40 18/45-5/40 90/15-5/40 18/15-25/40 18/75-5/40 18/15-35/40