Subtract 45/54 from 7/90
7/90 - 45/54 is -34/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 54 is 270
Next, find the equivalent fraction of both fractional numbers with denominator 270 - For the 1st fraction, since 90 × 3 = 270,
7/90 = 7 × 3/90 × 3 = 21/270 - Likewise, for the 2nd fraction, since 54 × 5 = 270,
45/54 = 45 × 5/54 × 5 = 225/270 - Subtract the two like fractions:
21/270 - 225/270 = 21 - 225/270 = -204/270 - After reducing the fraction, the answer is -34/45
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