Subtract 21/42 from 10/25
10/25 - 21/42 is -1/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 25 and 42 is 1050
Next, find the equivalent fraction of both fractional numbers with denominator 1050 - For the 1st fraction, since 25 × 42 = 1050,
10/25 = 10 × 42/25 × 42 = 420/1050 - Likewise, for the 2nd fraction, since 42 × 25 = 1050,
21/42 = 21 × 25/42 × 25 = 525/1050 - Subtract the two like fractions:
420/1050 - 525/1050 = 420 - 525/1050 = -105/1050 - After reducing the fraction, the answer is -1/10
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