Subtract 42/50 from 18/42
18/42 - 42/50 is -72/175.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 50 is 1050
Next, find the equivalent fraction of both fractional numbers with denominator 1050 - For the 1st fraction, since 42 × 25 = 1050,
18/42 = 18 × 25/42 × 25 = 450/1050 - Likewise, for the 2nd fraction, since 50 × 21 = 1050,
42/50 = 42 × 21/50 × 21 = 882/1050 - Subtract the two like fractions:
450/1050 - 882/1050 = 450 - 882/1050 = -432/1050 - After reducing the fraction, the answer is -72/175
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