Subtract 75/56 from 18/15
1st number: 1 3/15, 2nd number: 1 19/56
18/15 - 75/56 is -39/280.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 56 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 15 × 56 = 840,
18/15 = 18 × 56/15 × 56 = 1008/840 - Likewise, for the 2nd fraction, since 56 × 15 = 840,
75/56 = 75 × 15/56 × 15 = 1125/840 - Subtract the two like fractions:
1008/840 - 1125/840 = 1008 - 1125/840 = -117/840 - After reducing the fraction, the answer is -39/280
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/15-75/56 18/30-75/56 54/15-75/56 18/45-75/56 90/15-75/56 18/75-75/56