Subtract 90/7 from 45/56
1st number: 45/56, 2nd number: 12 6/7
45/56 - 90/7 is -675/56.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 56 and 7 is 56
Next, find the equivalent fraction of both fractional numbers with denominator 56 - For the 1st fraction, since 56 × 1 = 56,
45/56 = 45 × 1/56 × 1 = 45/56 - Likewise, for the 2nd fraction, since 7 × 8 = 56,
90/7 = 90 × 8/7 × 8 = 720/56 - Subtract the two like fractions:
45/56 - 720/56 = 45 - 720/56 = -675/56
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/56-90/7 45/56-90/14 45/56-90/21 45/56-90/35 45/56-90/49