Subtract 42/7 from 3/18
1st number: 3/18, 2nd number: 6 0/7
3/18 - 42/7 is -35/6.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 7 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 18 × 7 = 126,
3/18 = 3 × 7/18 × 7 = 21/126 - Likewise, for the 2nd fraction, since 7 × 18 = 126,
42/7 = 42 × 18/7 × 18 = 756/126 - Subtract the two like fractions:
21/126 - 756/126 = 21 - 756/126 = -735/126 - After reducing the fraction, the answer is -35/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/18-42/7 3/18-84/7 3/36-42/7 3/18-42/14 9/18-42/7 3/54-42/7 3/18-42/21 15/18-42/7 3/90-42/7 3/18-42/35 21/18-42/7 3/18-42/49