Subtract 20/42 from 12/3
1st number: 4 0/3, 2nd number: 20/42
12/3 - 20/42 is 74/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 42 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 3 × 14 = 42,
12/3 = 12 × 14/3 × 14 = 168/42 - Likewise, for the 2nd fraction, since 42 × 1 = 42,
20/42 = 20 × 1/42 × 1 = 20/42 - Subtract the two like fractions:
168/42 - 20/42 = 168 - 20/42 = 148/42 - After reducing the fraction, the answer is 74/21
- In mixed form: 311/21
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