Subtract 15/12 from 20/75, Solve 20/75

Subtract 15/12 from 20/75

1^st number: 20/75, 2^nd number: 1 3/12

20/75 - 15/12 is -59/60.

Find the least common denominator or LCM of the two denominators:
LCM of 75 and 12 is 300

Next, find the equivalent fraction of both fractional numbers with denominator 300
For the 1st fraction, since 75 × 4 = 300,
20/75 = 20 × 4/75 × 4 = 80/300
Likewise, for the 2nd fraction, since 12 × 25 = 300,
15/12 = 15 × 25/12 × 25 = 375/300
Subtract the two like fractions:
80/300 - 375/300 = 80 - 375/300 = -295/300
After reducing the fraction, the answer is -59/60

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