Subtract 18/4 from 7/28
1st number: 7/28, 2nd number: 4 2/4
7/28 - 18/4 is -17/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 4 is 28
Next, find the equivalent fraction of both fractional numbers with denominator 28 - For the 1st fraction, since 28 × 1 = 28,
7/28 = 7 × 1/28 × 1 = 7/28 - Likewise, for the 2nd fraction, since 4 × 7 = 28,
18/4 = 18 × 7/4 × 7 = 126/28 - Subtract the two like fractions:
7/28 - 126/28 = 7 - 126/28 = -119/28 - After reducing the fraction, the answer is -17/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/28-18/4 7/28-36/4 7/56-18/4 7/28-18/8 21/28-18/4 7/28-54/4 7/84-18/4 7/28-18/12 35/28-18/4 7/28-90/4 7/28-18/20 49/28-18/4 7/28-18/28