Add 20/7 and 70/18, Solve 2 6/7 + 3 16/18 as a fraction

Add 20/7 and 70/18

1^st number: 2 6/7, 2^nd number: 3 16/18

20/7 + 70/18 is 425/63.

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,
20/7 = 20 × 18/7 × 18 = 360/126
Likewise, for the 2nd fraction, since 18 × 7 = 126,
70/18 = 70 × 7/18 × 7 = 490/126
Add the two like fractions:
360/126 + 490/126 = 360 + 490/126 = 850/126
850/126 simplified gives 425/63
So, 20/7 + 70/18 = 425/63
In mixed form: 647/63

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