Subtract 18/42 from 28/15
1st number: 1 13/15, 2nd number: 18/42
28/15 - 18/42 is 151/105.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 42 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 15 × 14 = 210,
28/15 = 28 × 14/15 × 14 = 392/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
18/42 = 18 × 5/42 × 5 = 90/210 - Subtract the two like fractions:
392/210 - 90/210 = 392 - 90/210 = 302/210 - After reducing the fraction, the answer is 151/105
- In mixed form: 146/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/15-18/42 28/15-36/42 28/30-18/42 28/15-18/84 84/15-18/42 28/15-54/42 28/45-18/42 28/15-90/42 28/75-18/42