Add 84/21 and 42/48, Solve 4 0/21 + 42/48 as a fraction

Add 84/21 and 42/48

1^st number: 4 0/21, 2^nd number: 42/48

84/21 + 42/48 is 39/8.

Find the least common denominator or LCM of the two denominators:
LCM of 21 and 48 is 336

Next, find the equivalent fraction of both fractional numbers with denominator 336
For the 1st fraction, since 21 × 16 = 336,
84/21 = 84 × 16/21 × 16 = 1344/336
Likewise, for the 2nd fraction, since 48 × 7 = 336,
42/48 = 42 × 7/48 × 7 = 294/336
Add the two like fractions:
1344/336 + 294/336 = 1344 + 294/336 = 1638/336
1638/336 simplified gives 39/8
So, 84/21 + 42/48 = 39/8
In mixed form: 47/8

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