Subtract 90/20 from 63/56
1st number: 1 7/56, 2nd number: 4 10/20
63/56 - 90/20 is -27/8.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 56 and 20 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 56 × 5 = 280,
63/56 = 63 × 5/56 × 5 = 315/280 - Likewise, for the 2nd fraction, since 20 × 14 = 280,
90/20 = 90 × 14/20 × 14 = 1260/280 - Subtract the two like fractions:
315/280 - 1260/280 = 315 - 1260/280 = -945/280 - After reducing the fraction, the answer is -27/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 63/56-90/40 63/56-90/60