Subtract 9/5 from 90/28
1st number: 3 6/28, 2nd number: 1 4/5
90/28 - 9/5 is 99/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 5 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 28 × 5 = 140,
90/28 = 90 × 5/28 × 5 = 450/140 - Likewise, for the 2nd fraction, since 5 × 28 = 140,
9/5 = 9 × 28/5 × 28 = 252/140 - Subtract the two like fractions:
450/140 - 252/140 = 450 - 252/140 = 198/140 - After reducing the fraction, the answer is 99/70
- In mixed form: 129/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/28-18/5 90/56-9/5 90/28-9/10 90/28-27/5 90/84-9/5 90/28-9/15 90/28-45/5 90/28-9/25 90/28-63/5 90/28-9/35