Subtract 90/40 from 18/10
1st number: 1 8/10, 2nd number: 2 10/40
18/10 - 90/40 is -9/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 40 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 10 × 4 = 40,
18/10 = 18 × 4/10 × 4 = 72/40 - Likewise, for the 2nd fraction, since 40 × 1 = 40,
90/40 = 90 × 1/40 × 1 = 90/40 - Subtract the two like fractions:
72/40 - 90/40 = 72 - 90/40 = -18/40 - After reducing the fraction, the answer is -9/20
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