Subtract 18/15 from 2/42
1st number: 2/42, 2nd number: 1 3/15
2/42 - 18/15 is -121/105.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 15 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 42 × 5 = 210,
2/42 = 2 × 5/42 × 5 = 10/210 - Likewise, for the 2nd fraction, since 15 × 14 = 210,
18/15 = 18 × 14/15 × 14 = 252/210 - Subtract the two like fractions:
10/210 - 252/210 = 10 - 252/210 = -242/210 - After reducing the fraction, the answer is -121/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/42-18/15 2/42-36/15 2/84-18/15 2/42-18/30 6/42-18/15 2/42-54/15 2/42-18/45 10/42-18/15 2/42-90/15 2/42-18/75 14/42-18/15