Subtract 15/7 from 70/84
1st number: 70/84, 2nd number: 2 1/7
70/84 - 15/7 is -55/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 7 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 84 × 1 = 84,
70/84 = 70 × 1/84 × 1 = 70/84 - Likewise, for the 2nd fraction, since 7 × 12 = 84,
15/7 = 15 × 12/7 × 12 = 180/84 - Subtract the two like fractions:
70/84 - 180/84 = 70 - 180/84 = -110/84 - After reducing the fraction, the answer is -55/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/84-30/7 70/84-15/14 70/84-45/7 70/84-15/21 70/84-75/7 70/84-15/35 70/84-15/49