Subtract 21/80 from 45/75
45/75 - 21/80 is 27/80.
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,
45/75 = 45 × 16/75 × 16 = 720/1200 - Likewise, for the 2nd fraction, since 80 × 15 = 1200,
21/80 = 21 × 15/80 × 15 = 315/1200 - Subtract the two like fractions:
720/1200 - 315/1200 = 720 - 315/1200 = 405/1200 - After reducing the fraction, the answer is 27/80
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