Subtract 18/80 from 15/75
15/75 - 18/80 is -1/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 75 and 80 is 1200
Next, find the equivalent fraction of both fractional numbers with denominator 1200 - For the 1st fraction, since 75 × 16 = 1200,
15/75 = 15 × 16/75 × 16 = 240/1200 - Likewise, for the 2nd fraction, since 80 × 15 = 1200,
18/80 = 18 × 15/80 × 15 = 270/1200 - Subtract the two like fractions:
240/1200 - 270/1200 = 240 - 270/1200 = -30/1200 - After reducing the fraction, the answer is -1/40
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