Add 70/18 and 1/21, Solve 3 16/18 + 1/21 as a fraction

Add 70/18 and 1/21

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

70/18 + 1/21 is 248/63.

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

Next, find the equivalent fraction of both fractional numbers with denominator 126
For the 1st fraction, since 18 × 7 = 126,
70/18 = 70 × 7/18 × 7 = 490/126
Likewise, for the 2nd fraction, since 21 × 6 = 126,
1/21 = 1 × 6/21 × 6 = 6/126
Add the two like fractions:
490/126 + 6/126 = 490 + 6/126 = 496/126
496/126 simplified gives 248/63
So, 70/18 + 1/21 = 248/63
In mixed form: 359/63

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