Subtract 30/21 from 12/3
1st number: 4 0/3, 2nd number: 1 9/21
12/3 - 30/21 is 18/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 21 is 21
Next, find the equivalent fraction of both fractional numbers with denominator 21 - For the 1st fraction, since 3 × 7 = 21,
12/3 = 12 × 7/3 × 7 = 84/21 - Likewise, for the 2nd fraction, since 21 × 1 = 21,
30/21 = 30 × 1/21 × 1 = 30/21 - Subtract the two like fractions:
84/21 - 30/21 = 84 - 30/21 = 54/21 - After reducing the fraction, the answer is 18/7
- In mixed form: 24/7
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