Subtract 18/12 from 35/28
1st number: 1 7/28, 2nd number: 1 6/12
35/28 - 18/12 is -1/4.
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,
35/28 = 35 × 3/28 × 3 = 105/84 - Likewise, for the 2nd fraction, since 12 × 7 = 84,
18/12 = 18 × 7/12 × 7 = 126/84 - Subtract the two like fractions:
105/84 - 126/84 = 105 - 126/84 = -21/84 - After reducing the fraction, the answer is -1/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/28-18/12 35/28-36/12 35/56-18/12 35/28-18/24 35/28-54/12 35/84-18/12 35/28-18/36 35/28-90/12 35/28-18/60 35/28-18/84