Subtract 18/24 from 12/28
12/28 - 18/24 is -9/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 24 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 28 × 6 = 168,
12/28 = 12 × 6/28 × 6 = 72/168 - Likewise, for the 2nd fraction, since 24 × 7 = 168,
18/24 = 18 × 7/24 × 7 = 126/168 - Subtract the two like fractions:
72/168 - 126/168 = 72 - 126/168 = -54/168 - After reducing the fraction, the answer is -9/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/28-18/24 12/28-36/24 12/56-18/24 12/28-18/48 36/28-18/24 12/28-54/24 12/84-18/24 12/28-18/72 60/28-18/24 12/28-90/24 84/28-18/24