Subtract 18/35 from 42/15
1st number: 2 12/15, 2nd number: 18/35
42/15 - 18/35 is 16/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 35 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 15 × 7 = 105,
42/15 = 42 × 7/15 × 7 = 294/105 - Likewise, for the 2nd fraction, since 35 × 3 = 105,
18/35 = 18 × 3/35 × 3 = 54/105 - Subtract the two like fractions:
294/105 - 54/105 = 294 - 54/105 = 240/105 - After reducing the fraction, the answer is 16/7
- In mixed form: 22/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/15-18/35 42/15-36/35 42/30-18/35 42/15-18/70 42/15-54/35 42/45-18/35 42/15-90/35 42/75-18/35