Subtract 90/28 from 1/5
1st number: 1/5, 2nd number: 3 6/28
1/5 - 90/28 is -211/70.
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,
1/5 = 1 × 28/5 × 28 = 28/140 - Likewise, for the 2nd fraction, since 28 × 5 = 140,
90/28 = 90 × 5/28 × 5 = 450/140 - Subtract the two like fractions:
28/140 - 450/140 = 28 - 450/140 = -422/140 - After reducing the fraction, the answer is -211/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/5-90/28 1/10-90/28 1/5-90/56 3/5-90/28 1/15-90/28 1/5-90/84 1/25-90/28 7/5-90/28 1/35-90/28