Subtract 18/90 from 10/28
10/28 - 18/90 is 11/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 90 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 28 × 45 = 1260,
10/28 = 10 × 45/28 × 45 = 450/1260 - Likewise, for the 2nd fraction, since 90 × 14 = 1260,
18/90 = 18 × 14/90 × 14 = 252/1260 - Subtract the two like fractions:
450/1260 - 252/1260 = 450 - 252/1260 = 198/1260 - After reducing the fraction, the answer is 11/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/28-18/90 10/28-36/90 10/56-18/90 30/28-18/90 10/28-54/90 10/84-18/90 50/28-18/90 70/28-18/90