Subtract 12/18 from 28/7
1st number: 4 0/7, 2nd number: 12/18
28/7 - 12/18 is 10/3.
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,
28/7 = 28 × 18/7 × 18 = 504/126 - Likewise, for the 2nd fraction, since 18 × 7 = 126,
12/18 = 12 × 7/18 × 7 = 84/126 - Subtract the two like fractions:
504/126 - 84/126 = 504 - 84/126 = 420/126 - After reducing the fraction, the answer is 10/3
- In mixed form: 31/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/7-12/18 28/7-24/18 28/14-12/18 28/7-12/36 84/7-12/18 28/7-36/18 28/21-12/18 28/7-12/54 28/7-60/18 28/35-12/18 28/7-12/90 28/7-84/18 28/49-12/18