Subtract 15/6 from 18/42
1st number: 18/42, 2nd number: 2 3/6
18/42 - 15/6 is -29/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 6 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 42 × 1 = 42,
18/42 = 18 × 1/42 × 1 = 18/42 - Likewise, for the 2nd fraction, since 6 × 7 = 42,
15/6 = 15 × 7/6 × 7 = 105/42 - Subtract the two like fractions:
18/42 - 105/42 = 18 - 105/42 = -87/42 - After reducing the fraction, the answer is -29/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/42-15/6 18/42-30/6 18/84-15/6 18/42-15/12 54/42-15/6 18/42-45/6 18/42-15/18 90/42-15/6 18/42-75/6 18/42-15/30 18/42-15/42