Add 54/15 and 5/84, Solve 3 9/15 + 5/84 as a fraction

Add 54/15 and 5/84

1^st number: 3 9/15, 2^nd number: 5/84

54/15 + 5/84 is 1537/420.

Find the least common denominator or LCM of the two denominators:
LCM of 15 and 84 is 420

Next, find the equivalent fraction of both fractional numbers with denominator 420
For the 1st fraction, since 15 × 28 = 420,
54/15 = 54 × 28/15 × 28 = 1512/420
Likewise, for the 2nd fraction, since 84 × 5 = 420,
5/84 = 5 × 5/84 × 5 = 25/420
Add the two like fractions:
1512/420 + 25/420 = 1512 + 25/420 = 1537/420
So, 54/15 + 5/84 = 1537/420
In mixed form: 3277/420

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