Subtract 30/28 from 8/12
1st number: 8/12, 2nd number: 1 2/28
8/12 - 30/28 is -17/42.
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,
8/12 = 8 × 7/12 × 7 = 56/84 - Likewise, for the 2nd fraction, since 28 × 3 = 84,
30/28 = 30 × 3/28 × 3 = 90/84 - Subtract the two like fractions:
56/84 - 90/84 = 56 - 90/84 = -34/84 - After reducing the fraction, the answer is -17/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/12-30/28 8/12-60/28 8/24-30/28 8/12-30/56 24/12-30/28 8/12-90/28 8/36-30/28 8/12-30/84 40/12-30/28 8/60-30/28 56/12-30/28 8/84-30/28