Subtract 12/18 from 12/7
1st number: 1 5/7, 2nd number: 12/18
12/7 - 12/18 is 22/21.
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,
12/7 = 12 × 18/7 × 18 = 216/126 - Likewise, for the 2nd fraction, since 18 × 7 = 126,
12/18 = 12 × 7/18 × 7 = 84/126 - Subtract the two like fractions:
216/126 - 84/126 = 216 - 84/126 = 132/126 - After reducing the fraction, the answer is 22/21
- In mixed form: 11/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/7-12/18 12/7-24/18 12/14-12/18 12/7-12/36 36/7-12/18 12/7-36/18 12/21-12/18 12/7-12/54 60/7-12/18 12/7-60/18 12/35-12/18 12/7-12/90 84/7-12/18 12/7-84/18 12/49-12/18