Subtract 42/84 from 10/25
10/25 - 42/84 is -1/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 25 and 84 is 2100
Next, find the equivalent fraction of both fractional numbers with denominator 2100 - For the 1st fraction, since 25 × 84 = 2100,
10/25 = 10 × 84/25 × 84 = 840/2100 - Likewise, for the 2nd fraction, since 84 × 25 = 2100,
42/84 = 42 × 25/84 × 25 = 1050/2100 - Subtract the two like fractions:
840/2100 - 1050/2100 = 840 - 1050/2100 = -210/2100 - After reducing the fraction, the answer is -1/10
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