Subtract 10/5 from 18/28
1st number: 18/28, 2nd number: 2 0/5
18/28 - 10/5 is -19/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 5 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 28 × 5 = 140,
18/28 = 18 × 5/28 × 5 = 90/140 - Likewise, for the 2nd fraction, since 5 × 28 = 140,
10/5 = 10 × 28/5 × 28 = 280/140 - Subtract the two like fractions:
90/140 - 280/140 = 90 - 280/140 = -190/140 - After reducing the fraction, the answer is -19/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/28-10/5 18/28-20/5 18/56-10/5 54/28-10/5 18/28-30/5 18/84-10/5 18/28-10/15 90/28-10/5 18/28-50/5 18/28-10/25 18/28-70/5 18/28-10/35