Subtract 75/90 from 40/75, Solve 40/75

Subtract 75/90 from 40/75

40/75 - 75/90 is -3/10.

Find the least common denominator or LCM of the two denominators:
LCM of 75 and 90 is 450

Next, find the equivalent fraction of both fractional numbers with denominator 450
For the 1st fraction, since 75 × 6 = 450,
40/75 = 40 × 6/75 × 6 = 240/450
Likewise, for the 2nd fraction, since 90 × 5 = 450,
75/90 = 75 × 5/90 × 5 = 375/450
Subtract the two like fractions:
240/450 - 375/450 = 240 - 375/450 = -135/450
After reducing the fraction, the answer is -3/10

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