Subtract 40/18 from 1/7
1st number: 1/7, 2nd number: 2 4/18
1/7 - 40/18 is -131/63.
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,
1/7 = 1 × 18/7 × 18 = 18/126 - Likewise, for the 2nd fraction, since 18 × 7 = 126,
40/18 = 40 × 7/18 × 7 = 280/126 - Subtract the two like fractions:
18/126 - 280/126 = 18 - 280/126 = -262/126 - After reducing the fraction, the answer is -131/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/7-40/18 1/7-80/18 1/14-40/18 1/7-40/36 3/7-40/18 1/21-40/18 1/7-40/54 5/7-40/18 1/35-40/18 1/7-40/90 1/49-40/18