Subtract 70/12 from 15/28
1st number: 15/28, 2nd number: 5 10/12
15/28 - 70/12 is -445/84.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 12 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 28 × 3 = 84,
15/28 = 15 × 3/28 × 3 = 45/84 - Likewise, for the 2nd fraction, since 12 × 7 = 84,
70/12 = 70 × 7/12 × 7 = 490/84 - Subtract the two like fractions:
45/84 - 490/84 = 45 - 490/84 = -445/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/28-70/12 15/56-70/12 15/28-70/24 45/28-70/12 15/84-70/12 15/28-70/36 75/28-70/12 15/28-70/60 15/28-70/84