Subtract 21/42 from 12/75
12/75 - 21/42 is -17/50.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 75 and 42 is 1050
Next, find the equivalent fraction of both fractional numbers with denominator 1050 - For the 1st fraction, since 75 × 14 = 1050,
12/75 = 12 × 14/75 × 14 = 168/1050 - Likewise, for the 2nd fraction, since 42 × 25 = 1050,
21/42 = 21 × 25/42 × 25 = 525/1050 - Subtract the two like fractions:
168/1050 - 525/1050 = 168 - 525/1050 = -357/1050 - After reducing the fraction, the answer is -17/50
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