Subtract 15/8 from 90/56
1st number: 1 34/56, 2nd number: 1 7/8
90/56 - 15/8 is -15/56.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 56 and 8 is 56
Next, find the equivalent fraction of both fractional numbers with denominator 56 - For the 1st fraction, since 56 × 1 = 56,
90/56 = 90 × 1/56 × 1 = 90/56 - Likewise, for the 2nd fraction, since 8 × 7 = 56,
15/8 = 15 × 7/8 × 7 = 105/56 - Subtract the two like fractions:
90/56 - 105/56 = 90 - 105/56 = -15/56
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/56-30/8 90/56-15/16 90/56-45/8 90/56-15/24 90/56-75/8 90/56-15/40 90/56-15/56