Subtract 9/18 from 2/28
2/28 - 9/18 is -3/7.
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,
2/28 = 2 × 9/28 × 9 = 18/252 - Likewise, for the 2nd fraction, since 18 × 14 = 252,
9/18 = 9 × 14/18 × 14 = 126/252 - Subtract the two like fractions:
18/252 - 126/252 = 18 - 126/252 = -108/252 - After reducing the fraction, the answer is -3/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/28-9/18 2/56-9/18 2/28-9/36 6/28-9/18 2/28-27/18 2/84-9/18 2/28-9/54 10/28-9/18 2/28-45/18 2/28-9/90 14/28-9/18 2/28-63/18