Subtract 30/18 from 56/15
1st number: 3 11/15, 2nd number: 1 12/18
56/15 - 30/18 is 31/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 18 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 15 × 6 = 90,
56/15 = 56 × 6/15 × 6 = 336/90 - Likewise, for the 2nd fraction, since 18 × 5 = 90,
30/18 = 30 × 5/18 × 5 = 150/90 - Subtract the two like fractions:
336/90 - 150/90 = 336 - 150/90 = 186/90 - After reducing the fraction, the answer is 31/15
- In mixed form: 21/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/15-60/18 56/30-30/18 56/15-30/36 56/15-90/18 56/45-30/18 56/15-30/54 56/75-30/18 56/15-30/90