Add 21/7 and 3/18, Solve 3 0/7 + 3/18 as a fraction

Add 21/7 and 3/18

1^st number: 3 0/7, 2^nd number: 3/18

21/7 + 3/18 is 19/6.

Find the least common denominator or LCM of the two denominators:
LCM of 7 and 18 is 126

Next, find the equivalent fraction of both fractional numbers with denominator 126
For the 1st fraction, since 7 × 18 = 126,
21/7 = 21 × 18/7 × 18 = 378/126
Likewise, for the 2nd fraction, since 18 × 7 = 126,
3/18 = 3 × 7/18 × 7 = 21/126
Add the two like fractions:
378/126 + 21/126 = 378 + 21/126 = 399/126
399/126 simplified gives 19/6
So, 21/7 + 3/18 = 19/6
In mixed form: 31/6

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