Add 21/3 and 27/18
1st number: 7 0/3, 2nd number: 1 9/18
21/3 + 27/18 is 17/2.
Steps for adding 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,
21/3 = 21 × 6/3 × 6 = 126/18 - Likewise, for the 2nd fraction, since 18 × 1 = 18,
27/18 = 27 × 1/18 × 1 = 27/18 - Add the two like fractions:
126/18 + 27/18 = 126 + 27/18 = 153/18 - 153/18 simplified gives 17/2
- So, 21/3 + 27/18 = 17/2
In mixed form: 81/2
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