Subtract 75/90 from 7/18
7/18 - 75/90 is -4/9.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 90 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 18 × 5 = 90,
7/18 = 7 × 5/18 × 5 = 35/90 - Likewise, for the 2nd fraction, since 90 × 1 = 90,
75/90 = 75 × 1/90 × 1 = 75/90 - Subtract the two like fractions:
35/90 - 75/90 = 35 - 75/90 = -40/90 - After reducing the fraction, the answer is -4/9
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