Add 81/21 and 3/16, Solve 3 18/21 + 3/16 as a fraction

Add 81/21 and 3/16

1^st number: 3 18/21, 2^nd number: 3/16

81/21 + 3/16 is 453/112.

Find the least common denominator or LCM of the two denominators:
LCM of 21 and 16 is 336

Next, find the equivalent fraction of both fractional numbers with denominator 336
For the 1st fraction, since 21 × 16 = 336,
81/21 = 81 × 16/21 × 16 = 1296/336
Likewise, for the 2nd fraction, since 16 × 21 = 336,
3/16 = 3 × 21/16 × 21 = 63/336
Add the two like fractions:
1296/336 + 63/336 = 1296 + 63/336 = 1359/336
1359/336 simplified gives 453/112
So, 81/21 + 3/16 = 453/112
In mixed form: 45/112

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