Add 8/21 and 70/18, Solve 8/21 + 3 16/18 as a fraction

Add 8/21 and 70/18

1^st number: 8/21, 2^nd number: 3 16/18

8/21 + 70/18 is 269/63.

Find the least common denominator or LCM of the two denominators:
LCM of 21 and 18 is 126

Next, find the equivalent fraction of both fractional numbers with denominator 126
For the 1st fraction, since 21 × 6 = 126,
8/21 = 8 × 6/21 × 6 = 48/126
Likewise, for the 2nd fraction, since 18 × 7 = 126,
70/18 = 70 × 7/18 × 7 = 490/126
Add the two like fractions:
48/126 + 490/126 = 48 + 490/126 = 538/126
538/126 simplified gives 269/63
So, 8/21 + 70/18 = 269/63
In mixed form: 417/63

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