Subtract 63/7 from 90/28
1st number: 3 6/28, 2nd number: 9 0/7
90/28 - 63/7 is -81/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 7 is 28
Next, find the equivalent fraction of both fractional numbers with denominator 28 - For the 1st fraction, since 28 × 1 = 28,
90/28 = 90 × 1/28 × 1 = 90/28 - Likewise, for the 2nd fraction, since 7 × 4 = 28,
63/7 = 63 × 4/7 × 4 = 252/28 - Subtract the two like fractions:
90/28 - 252/28 = 90 - 252/28 = -162/28 - After reducing the fraction, the answer is -81/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/56-63/7 90/28-63/14 90/84-63/7 90/28-63/21 90/28-63/35 90/28-63/49