Add 2/21 and 42/18, Solve 2/21 + 2 6/18 as a fraction

Add 2/21 and 42/18

1^st number: 2/21, 2^nd number: 2 6/18

2/21 + 42/18 is 17/7.

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,
2/21 = 2 × 6/21 × 6 = 12/126
Likewise, for the 2nd fraction, since 18 × 7 = 126,
42/18 = 42 × 7/18 × 7 = 294/126
Add the two like fractions:
12/126 + 294/126 = 12 + 294/126 = 306/126
306/126 simplified gives 17/7
So, 2/21 + 42/18 = 17/7
In mixed form: 23/7

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