Subtract 21/25 from 10/42
10/42 - 21/25 is -316/525.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 25 is 1050
Next, find the equivalent fraction of both fractional numbers with denominator 1050 - For the 1st fraction, since 42 × 25 = 1050,
10/42 = 10 × 25/42 × 25 = 250/1050 - Likewise, for the 2nd fraction, since 25 × 42 = 1050,
21/25 = 21 × 42/25 × 42 = 882/1050 - Subtract the two like fractions:
250/1050 - 882/1050 = 250 - 882/1050 = -632/1050 - After reducing the fraction, the answer is -316/525
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