Subtract 15/56 from 70/80
70/80 - 15/56 is 17/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 56 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 56 × 10 = 560,
15/56 = 15 × 10/56 × 10 = 150/560 - Subtract the two like fractions:
490/560 - 150/560 = 490 - 150/560 = 340/560 - After reducing the fraction, the answer is 17/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/80-30/56 70/80-45/56 70/80-75/56