Subtract 28/18 from 8/5
1st number: 1 3/5, 2nd number: 1 10/18
8/5 - 28/18 is 2/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 18 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 18 × 5 = 90,
28/18 = 28 × 5/18 × 5 = 140/90 - Subtract the two like fractions:
144/90 - 140/90 = 144 - 140/90 = 4/90 - After reducing the fraction, the answer is 2/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/5-28/18 8/5-56/18 8/10-28/18 8/5-28/36 24/5-28/18 8/5-84/18 8/15-28/18 8/5-28/54 40/5-28/18 8/25-28/18 8/5-28/90 56/5-28/18 8/35-28/18