Subtract 9/21 from 18/3
1st number: 6 0/3, 2nd number: 9/21
18/3 - 9/21 is 39/7.
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,
18/3 = 18 × 7/3 × 7 = 126/21 - Likewise, for the 2nd fraction, since 21 × 1 = 21,
9/21 = 9 × 1/21 × 1 = 9/21 - Subtract the two like fractions:
126/21 - 9/21 = 126 - 9/21 = 117/21 - After reducing the fraction, the answer is 39/7
- In mixed form: 54/7
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