Subtract 20/42 from 18/4
1st number: 4 2/4, 2nd number: 20/42
18/4 - 20/42 is 169/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 42 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 4 × 21 = 84,
18/4 = 18 × 21/4 × 21 = 378/84 - Likewise, for the 2nd fraction, since 42 × 2 = 84,
20/42 = 20 × 2/42 × 2 = 40/84 - Subtract the two like fractions:
378/84 - 40/84 = 378 - 40/84 = 338/84 - After reducing the fraction, the answer is 169/42
- In mixed form: 41/42
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