Subtract 90/75 from 9/12, Solve 9/12

Subtract 90/75 from 9/12

1^st number: 9/12, 2^nd number: 1 15/75

9/12 - 90/75 is -9/20.

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

Next, find the equivalent fraction of both fractional numbers with denominator 300
For the 1st fraction, since 12 × 25 = 300,
9/12 = 9 × 25/12 × 25 = 225/300
Likewise, for the 2nd fraction, since 75 × 4 = 300,
90/75 = 90 × 4/75 × 4 = 360/300
Subtract the two like fractions:
225/300 - 360/300 = 225 - 360/300 = -135/300
After reducing the fraction, the answer is -9/20

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