Subtract 12/28 from 15/18
15/18 - 12/28 is 17/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 28 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 18 × 14 = 252,
15/18 = 15 × 14/18 × 14 = 210/252 - Likewise, for the 2nd fraction, since 28 × 9 = 252,
12/28 = 12 × 9/28 × 9 = 108/252 - Subtract the two like fractions:
210/252 - 108/252 = 210 - 108/252 = 102/252 - After reducing the fraction, the answer is 17/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/18-12/28 15/18-24/28 15/36-12/28 15/18-12/56 45/18-12/28 15/18-36/28 15/54-12/28 15/18-12/84 75/18-12/28 15/18-60/28 15/90-12/28 15/18-84/28