Subtract 21/54 from 10/80
10/80 - 21/54 is -19/72.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 54 is 2160
Next, find the equivalent fraction of both fractional numbers with denominator 2160 - For the 1st fraction, since 80 × 27 = 2160,
10/80 = 10 × 27/80 × 27 = 270/2160 - Likewise, for the 2nd fraction, since 54 × 40 = 2160,
21/54 = 21 × 40/54 × 40 = 840/2160 - Subtract the two like fractions:
270/2160 - 840/2160 = 270 - 840/2160 = -570/2160 - After reducing the fraction, the answer is -19/72
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