Subtract 12/18 from 45/7
1st number: 6 3/7, 2nd number: 12/18
45/7 - 12/18 is 121/21.
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,
45/7 = 45 × 18/7 × 18 = 810/126 - Likewise, for the 2nd fraction, since 18 × 7 = 126,
12/18 = 12 × 7/18 × 7 = 84/126 - Subtract the two like fractions:
810/126 - 84/126 = 810 - 84/126 = 726/126 - After reducing the fraction, the answer is 121/21
- In mixed form: 516/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/7-12/18 45/7-24/18 45/14-12/18 45/7-12/36 45/7-36/18 45/21-12/18 45/7-12/54 45/7-60/18 45/35-12/18 45/7-12/90 45/7-84/18 45/49-12/18