Subtract 18/32 from 18/40
18/40 - 18/32 is -9/80.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 32 is 160
Next, find the equivalent fraction of both fractional numbers with denominator 160 - For the 1st fraction, since 40 × 4 = 160,
18/40 = 18 × 4/40 × 4 = 72/160 - Likewise, for the 2nd fraction, since 32 × 5 = 160,
18/32 = 18 × 5/32 × 5 = 90/160 - Subtract the two like fractions:
72/160 - 90/160 = 72 - 90/160 = -18/160 - After reducing the fraction, the answer is -9/80
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