Subtract 21/27 from 15/80
15/80 - 21/27 is -85/144.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 27 is 2160
Next, find the equivalent fraction of both fractional numbers with denominator 2160 - For the 1st fraction, since 80 × 27 = 2160,
15/80 = 15 × 27/80 × 27 = 405/2160 - Likewise, for the 2nd fraction, since 27 × 80 = 2160,
21/27 = 21 × 80/27 × 80 = 1680/2160 - Subtract the two like fractions:
405/2160 - 1680/2160 = 405 - 1680/2160 = -1275/2160 - After reducing the fraction, the answer is -85/144
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