Subtract 42/18 from 42/7
1st number: 6 0/7, 2nd number: 2 6/18
42/7 - 42/18 is 11/3.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 18 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 7 × 18 = 126,
42/7 = 42 × 18/7 × 18 = 756/126 - Likewise, for the 2nd fraction, since 18 × 7 = 126,
42/18 = 42 × 7/18 × 7 = 294/126 - Subtract the two like fractions:
756/126 - 294/126 = 756 - 294/126 = 462/126 - After reducing the fraction, the answer is 11/3
- In mixed form: 32/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/7-42/18 42/7-84/18 42/14-42/18 42/7-42/36 42/21-42/18 42/7-42/54 42/35-42/18 42/7-42/90 42/49-42/18