Subtract 84/75 from 21/42
1st number: 21/42, 2nd number: 1 9/75
21/42 - 84/75 is -31/50.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 75 is 1050
Next, find the equivalent fraction of both fractional numbers with denominator 1050 - For the 1st fraction, since 42 × 25 = 1050,
21/42 = 21 × 25/42 × 25 = 525/1050 - Likewise, for the 2nd fraction, since 75 × 14 = 1050,
84/75 = 84 × 14/75 × 14 = 1176/1050 - Subtract the two like fractions:
525/1050 - 1176/1050 = 525 - 1176/1050 = -651/1050 - After reducing the fraction, the answer is -31/50
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