Subtract 3/12 from 18/28
18/28 - 3/12 is 11/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 12 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 28 × 3 = 84,
18/28 = 18 × 3/28 × 3 = 54/84 - Likewise, for the 2nd fraction, since 12 × 7 = 84,
3/12 = 3 × 7/12 × 7 = 21/84 - Subtract the two like fractions:
54/84 - 21/84 = 54 - 21/84 = 33/84 - After reducing the fraction, the answer is 11/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/28-3/12 18/28-6/12 18/56-3/12 18/28-3/24 54/28-3/12 18/28-9/12 18/84-3/12 18/28-3/36 90/28-3/12 18/28-15/12 18/28-3/60 18/28-21/12 18/28-3/84