Subtract 84/18 from 1/7
1st number: 1/7, 2nd number: 4 12/18
1/7 - 84/18 is -95/21.
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,
84/18 = 84 × 7/18 × 7 = 588/126 - Subtract the two like fractions:
18/126 - 588/126 = 18 - 588/126 = -570/126 - After reducing the fraction, the answer is -95/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/7-84/18 1/14-84/18 1/7-84/36 3/7-84/18 1/21-84/18 1/7-84/54 5/7-84/18 1/35-84/18 1/7-84/90 1/49-84/18