Subtract 10/18 from 12/80, Solve 12/80

Subtract 10/18 from 12/80

12/80 - 10/18 is -73/180.

Find the least common denominator or LCM of the two denominators:
LCM of 80 and 18 is 720

Next, find the equivalent fraction of both fractional numbers with denominator 720
For the 1st fraction, since 80 × 9 = 720,
12/80 = 12 × 9/80 × 9 = 108/720
Likewise, for the 2nd fraction, since 18 × 40 = 720,
10/18 = 10 × 40/18 × 40 = 400/720
Subtract the two like fractions:
108/720 - 400/720 = 108 - 400/720 = -292/720
After reducing the fraction, the answer is -73/180

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