Subtract 5/80 from 12/54, Solve 12/54

Subtract 5/80 from 12/54

12/54 - 5/80 is 23/144.

Find the least common denominator or LCM of the two denominators:
LCM of 54 and 80 is 2160

Next, find the equivalent fraction of both fractional numbers with denominator 2160
For the 1st fraction, since 54 × 40 = 2160,
12/54 = 12 × 40/54 × 40 = 480/2160
Likewise, for the 2nd fraction, since 80 × 27 = 2160,
5/80 = 5 × 27/80 × 27 = 135/2160
Subtract the two like fractions:
480/2160 - 135/2160 = 480 - 135/2160 = 345/2160
After reducing the fraction, the answer is 23/144

MathStep (Works offline)

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