Subtract 45/75 from 9/80, Solve 9/80

Subtract 45/75 from 9/80

9/80 - 45/75 is -39/80.

Find the least common denominator or LCM of the two denominators:
LCM of 80 and 75 is 1200

Next, find the equivalent fraction of both fractional numbers with denominator 1200
For the 1st fraction, since 80 × 15 = 1200,
9/80 = 9 × 15/80 × 15 = 135/1200
Likewise, for the 2nd fraction, since 75 × 16 = 1200,
45/75 = 45 × 16/75 × 16 = 720/1200
Subtract the two like fractions:
135/1200 - 720/1200 = 135 - 720/1200 = -585/1200
After reducing the fraction, the answer is -39/80

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