Add 72/42 and 9/84, Solve 1 30/42 + 9/84 as a fraction

Add 72/42 and 9/84

1^st number: 1 30/42, 2^nd number: 9/84

72/42 + 9/84 is 51/28.

Find the least common denominator or LCM of the two denominators:
LCM of 42 and 84 is 84

Next, find the equivalent fraction of both fractional numbers with denominator 84
For the 1st fraction, since 42 × 2 = 84,
72/42 = 72 × 2/42 × 2 = 144/84
Likewise, for the 2nd fraction, since 84 × 1 = 84,
9/84 = 9 × 1/84 × 1 = 9/84
Add the two like fractions:
144/84 + 9/84 = 144 + 9/84 = 153/84
153/84 simplified gives 51/28
So, 72/42 + 9/84 = 51/28
In mixed form: 123/28

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