Subtract 15/18 from 10/28
10/28 - 15/18 is -10/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 18 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 28 × 9 = 252,
10/28 = 10 × 9/28 × 9 = 90/252 - Likewise, for the 2nd fraction, since 18 × 14 = 252,
15/18 = 15 × 14/18 × 14 = 210/252 - Subtract the two like fractions:
90/252 - 210/252 = 90 - 210/252 = -120/252 - After reducing the fraction, the answer is -10/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/28-15/18 10/28-30/18 10/56-15/18 10/28-15/36 30/28-15/18 10/28-45/18 10/84-15/18 10/28-15/54 50/28-15/18 10/28-75/18 10/28-15/90 70/28-15/18