Subtract 10/28 from 20/12
1st number: 1 8/12, 2nd number: 10/28
20/12 - 10/28 is 55/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 28 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 12 × 7 = 84,
20/12 = 20 × 7/12 × 7 = 140/84 - Likewise, for the 2nd fraction, since 28 × 3 = 84,
10/28 = 10 × 3/28 × 3 = 30/84 - Subtract the two like fractions:
140/84 - 30/84 = 140 - 30/84 = 110/84 - After reducing the fraction, the answer is 55/42
- In mixed form: 113/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/12-10/28 20/12-20/28 20/24-10/28 20/12-10/56 60/12-10/28 20/12-30/28 20/36-10/28 20/12-10/84 20/12-50/28 20/60-10/28 20/12-70/28 20/84-10/28