Subtract 90/80 from 5/28
1st number: 5/28, 2nd number: 1 10/80
5/28 - 90/80 is -53/56.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 80 is 560
Next, find the equivalent fraction of both fractional numbers with denominator 560 - For the 1st fraction, since 28 × 20 = 560,
5/28 = 5 × 20/28 × 20 = 100/560 - Likewise, for the 2nd fraction, since 80 × 7 = 560,
90/80 = 90 × 7/80 × 7 = 630/560 - Subtract the two like fractions:
100/560 - 630/560 = 100 - 630/560 = -530/560 - After reducing the fraction, the answer is -53/56
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/28-90/80 5/56-90/80 15/28-90/80 5/84-90/80 25/28-90/80 35/28-90/80