Subtract 90/28 from 35/20
1st number: 1 15/20, 2nd number: 3 6/28
35/20 - 90/28 is -41/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 28 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 20 × 7 = 140,
35/20 = 35 × 7/20 × 7 = 245/140 - Likewise, for the 2nd fraction, since 28 × 5 = 140,
90/28 = 90 × 5/28 × 5 = 450/140 - Subtract the two like fractions:
245/140 - 450/140 = 245 - 450/140 = -205/140 - After reducing the fraction, the answer is -41/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/20-90/28 35/40-90/28 35/20-90/56 35/60-90/28 35/20-90/84