Add 42/21 and 9/18, Solve 2 0/21 + 9/18 as a fraction

Add 42/21 and 9/18

1^st number: 2 0/21, 2^nd number: 9/18

42/21 + 9/18 is 5/2.

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,
42/21 = 42 × 6/21 × 6 = 252/126
Likewise, for the 2nd fraction, since 18 × 7 = 126,
9/18 = 9 × 7/18 × 7 = 63/126
Add the two like fractions:
252/126 + 63/126 = 252 + 63/126 = 315/126
315/126 simplified gives 5/2
So, 42/21 + 9/18 = 5/2
In mixed form: 21/2

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