Subtract 9/18 from 9/28
9/28 - 9/18 is -5/28.
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,
9/28 = 9 × 9/28 × 9 = 81/252 - Likewise, for the 2nd fraction, since 18 × 14 = 252,
9/18 = 9 × 14/18 × 14 = 126/252 - Subtract the two like fractions:
81/252 - 126/252 = 81 - 126/252 = -45/252 - After reducing the fraction, the answer is -5/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/28-9/18 9/56-9/18 9/28-9/36 27/28-9/18 9/28-27/18 9/84-9/18 9/28-9/54 45/28-9/18 9/28-45/18 9/28-9/90 63/28-9/18 9/28-63/18