Add 42/2 and 21/30, Solve 21 0/2 + 21/30 as a fraction

Add 42/2 and 21/30

1^st number: 21 0/2, 2^nd number: 21/30

42/2 + 21/30 is 217/10.

Find the least common denominator or LCM of the two denominators:
LCM of 2 and 30 is 30

Next, find the equivalent fraction of both fractional numbers with denominator 30
For the 1st fraction, since 2 × 15 = 30,
42/2 = 42 × 15/2 × 15 = 630/30
Likewise, for the 2nd fraction, since 30 × 1 = 30,
21/30 = 21 × 1/30 × 1 = 21/30
Add the two like fractions:
630/30 + 21/30 = 630 + 21/30 = 651/30
651/30 simplified gives 217/10
So, 42/2 + 21/30 = 217/10
In mixed form: 217/10

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