Subtract 21/18 from 20/3
1st number: 6 2/3, 2nd number: 1 3/18
20/3 - 21/18 is 11/2.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 18 is 18
Next, find the equivalent fraction of both fractional numbers with denominator 18 - For the 1st fraction, since 3 × 6 = 18,
20/3 = 20 × 6/3 × 6 = 120/18 - Likewise, for the 2nd fraction, since 18 × 1 = 18,
21/18 = 21 × 1/18 × 1 = 21/18 - Subtract the two like fractions:
120/18 - 21/18 = 120 - 21/18 = 99/18 - After reducing the fraction, the answer is 11/2
- In mixed form: 51/2
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