Subtract 42/80 from 21/27
21/27 - 42/80 is 91/360.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 27 and 80 is 2160
Next, find the equivalent fraction of both fractional numbers with denominator 2160 - For the 1st fraction, since 27 × 80 = 2160,
21/27 = 21 × 80/27 × 80 = 1680/2160 - Likewise, for the 2nd fraction, since 80 × 27 = 2160,
42/80 = 42 × 27/80 × 27 = 1134/2160 - Subtract the two like fractions:
1680/2160 - 1134/2160 = 1680 - 1134/2160 = 546/2160 - After reducing the fraction, the answer is 91/360
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