Subtract 70/21 from 15/14
1st number: 1 1/14, 2nd number: 3 7/21
15/14 - 70/21 is -95/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 14 and 21 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 14 × 3 = 42,
15/14 = 15 × 3/14 × 3 = 45/42 - Likewise, for the 2nd fraction, since 21 × 2 = 42,
70/21 = 70 × 2/21 × 2 = 140/42 - Subtract the two like fractions:
45/42 - 140/42 = 45 - 140/42 = -95/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/14-70/21 15/28-70/21 15/14-70/42 45/14-70/21 15/42-70/21 15/14-70/63 75/14-70/21 15/70-70/21 15/98-70/21