Subtract 21/25 from 20/84
20/84 - 21/25 is -316/525.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 25 is 2100
Next, find the equivalent fraction of both fractional numbers with denominator 2100 - For the 1st fraction, since 84 × 25 = 2100,
20/84 = 20 × 25/84 × 25 = 500/2100 - Likewise, for the 2nd fraction, since 25 × 84 = 2100,
21/25 = 21 × 84/25 × 84 = 1764/2100 - Subtract the two like fractions:
500/2100 - 1764/2100 = 500 - 1764/2100 = -1264/2100 - After reducing the fraction, the answer is -316/525
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