Subtract 90/72 from 36/75, Solve 36/75

Subtract 90/72 from 36/75

1^st number: 36/75, 2^nd number: 1 18/72

36/75 - 90/72 is -77/100.

Find the least common denominator or LCM of the two denominators:
LCM of 75 and 72 is 1800

Next, find the equivalent fraction of both fractional numbers with denominator 1800
For the 1st fraction, since 75 × 24 = 1800,
36/75 = 36 × 24/75 × 24 = 864/1800
Likewise, for the 2nd fraction, since 72 × 25 = 1800,
90/72 = 90 × 25/72 × 25 = 2250/1800
Subtract the two like fractions:
864/1800 - 2250/1800 = 864 - 2250/1800 = -1386/1800
After reducing the fraction, the answer is -77/100

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