Subtract 42/21 from 18/50
1st number: 18/50, 2nd number: 2 0/21
18/50 - 42/21 is -41/25.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 50 and 21 is 1050
Next, find the equivalent fraction of both fractional numbers with denominator 1050 - For the 1st fraction, since 50 × 21 = 1050,
18/50 = 18 × 21/50 × 21 = 378/1050 - Likewise, for the 2nd fraction, since 21 × 50 = 1050,
42/21 = 42 × 50/21 × 50 = 2100/1050 - Subtract the two like fractions:
378/1050 - 2100/1050 = 378 - 2100/1050 = -1722/1050 - After reducing the fraction, the answer is -41/25
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