Subtract 28/18 from 2/5
1st number: 2/5, 2nd number: 1 10/18
2/5 - 28/18 is -52/45.
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,
2/5 = 2 × 18/5 × 18 = 36/90 - Likewise, for the 2nd fraction, since 18 × 5 = 90,
28/18 = 28 × 5/18 × 5 = 140/90 - Subtract the two like fractions:
36/90 - 140/90 = 36 - 140/90 = -104/90 - After reducing the fraction, the answer is -52/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/5-28/18 2/5-56/18 2/10-28/18 2/5-28/36 6/5-28/18 2/5-84/18 2/15-28/18 2/5-28/54 10/5-28/18 2/25-28/18 2/5-28/90 14/5-28/18 2/35-28/18