Subtract 15/28 from 10/80
10/80 - 15/28 is -23/56.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 28 is 560
Next, find the equivalent fraction of both fractional numbers with denominator 560 - For the 1st fraction, since 80 × 7 = 560,
10/80 = 10 × 7/80 × 7 = 70/560 - Likewise, for the 2nd fraction, since 28 × 20 = 560,
15/28 = 15 × 20/28 × 20 = 300/560 - Subtract the two like fractions:
70/560 - 300/560 = 70 - 300/560 = -230/560 - After reducing the fraction, the answer is -23/56
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/80-15/28 10/80-30/28 10/80-15/56 30/80-15/28 10/80-45/28 10/80-15/84 50/80-15/28 10/80-75/28 70/80-15/28