Subtract 90/28 from 7/5
1st number: 1 2/5, 2nd number: 3 6/28
7/5 - 90/28 is -127/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 28 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 5 × 28 = 140,
7/5 = 7 × 28/5 × 28 = 196/140 - Likewise, for the 2nd fraction, since 28 × 5 = 140,
90/28 = 90 × 5/28 × 5 = 450/140 - Subtract the two like fractions:
196/140 - 450/140 = 196 - 450/140 = -254/140 - After reducing the fraction, the answer is -127/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/5-90/28 7/10-90/28 7/5-90/56 21/5-90/28 7/15-90/28 7/5-90/84 35/5-90/28 7/25-90/28 49/5-90/28 7/35-90/28