Subtract 7/12 from 28/80, Solve 28/80

Subtract 7/12 from 28/80

28/80 - 7/12 is -7/30.

Find the least common denominator or LCM of the two denominators:
LCM of 80 and 12 is 240

Next, find the equivalent fraction of both fractional numbers with denominator 240
For the 1st fraction, since 80 × 3 = 240,
28/80 = 28 × 3/80 × 3 = 84/240
Likewise, for the 2nd fraction, since 12 × 20 = 240,
7/12 = 7 × 20/12 × 20 = 140/240
Subtract the two like fractions:
84/240 - 140/240 = 84 - 140/240 = -56/240
After reducing the fraction, the answer is -7/30

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