Subtract 10/9 from 5/80, Solve 5/80

Subtract 10/9 from 5/80

1^st number: 5/80, 2^nd number: 1 1/9

5/80 - 10/9 is -151/144.

Find the least common denominator or LCM of the two denominators:
LCM of 80 and 9 is 720

Next, find the equivalent fraction of both fractional numbers with denominator 720
For the 1st fraction, since 80 × 9 = 720,
5/80 = 5 × 9/80 × 9 = 45/720
Likewise, for the 2nd fraction, since 9 × 80 = 720,
10/9 = 10 × 80/9 × 80 = 800/720
Subtract the two like fractions:
45/720 - 800/720 = 45 - 800/720 = -755/720
After reducing the fraction, the answer is -151/144

MathStep (Works offline)

Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad