Subtract 7/90 from 8/5
1st number: 1 3/5, 2nd number: 7/90
8/5 - 7/90 is 137/90.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 90 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 5 × 18 = 90,
8/5 = 8 × 18/5 × 18 = 144/90 - Likewise, for the 2nd fraction, since 90 × 1 = 90,
7/90 = 7 × 1/90 × 1 = 7/90 - Subtract the two like fractions:
144/90 - 7/90 = 144 - 7/90 = 137/90 - In mixed form: 147/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/5-7/90 8/5-14/90 8/10-7/90 24/5-7/90 8/5-21/90 8/15-7/90 40/5-7/90 8/5-35/90 8/25-7/90 56/5-7/90 8/5-49/90 8/35-7/90