Subtract 18/10 from 90/28
1st number: 3 6/28, 2nd number: 1 8/10
90/28 - 18/10 is 99/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 10 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 10 × 14 = 140,
18/10 = 18 × 14/10 × 14 = 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: 90/28-36/10 90/56-18/10 90/28-18/20 90/28-54/10 90/84-18/10 90/28-18/30 90/28-90/10 90/28-18/50 90/28-18/70