Subtract 81/90 from 3/75
3/75 - 81/90 is -43/50.
Steps for subtracting fractions
- 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,
3/75 = 3 × 6/75 × 6 = 18/450 - Likewise, for the 2nd fraction, since 90 × 5 = 450,
81/90 = 81 × 5/90 × 5 = 405/450 - Subtract the two like fractions:
18/450 - 405/450 = 18 - 405/450 = -387/450 - After reducing the fraction, the answer is -43/50
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