Subtract 90/25 from 18/40
1st number: 18/40, 2nd number: 3 15/25
18/40 - 90/25 is -63/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 25 is 200
Next, find the equivalent fraction of both fractional numbers with denominator 200 - For the 1st fraction, since 40 × 5 = 200,
18/40 = 18 × 5/40 × 5 = 90/200 - Likewise, for the 2nd fraction, since 25 × 8 = 200,
90/25 = 90 × 8/25 × 8 = 720/200 - Subtract the two like fractions:
90/200 - 720/200 = 90 - 720/200 = -630/200 - After reducing the fraction, the answer is -63/20
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