Subtract 15/7 from 70/80
1st number: 70/80, 2nd number: 2 1/7
70/80 - 15/7 is -71/56.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 7 is 560
Next, find the equivalent fraction of both fractional numbers with denominator 560 - For the 1st fraction, since 80 × 7 = 560,
70/80 = 70 × 7/80 × 7 = 490/560 - Likewise, for the 2nd fraction, since 7 × 80 = 560,
15/7 = 15 × 80/7 × 80 = 1200/560 - Subtract the two like fractions:
490/560 - 1200/560 = 490 - 1200/560 = -710/560 - After reducing the fraction, the answer is -71/56
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/80-30/7 70/80-15/14 70/80-45/7 70/80-15/21 70/80-75/7 70/80-15/35 70/80-15/49