Add 40/21 and 9/16, Solve 1 19/21 + 9/16 as a fraction

Add 40/21 and 9/16

1^st number: 1 19/21, 2^nd number: 9/16

40/21 + 9/16 is 829/336.

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,
40/21 = 40 × 16/21 × 16 = 640/336
Likewise, for the 2nd fraction, since 16 × 21 = 336,
9/16 = 9 × 21/16 × 21 = 189/336
Add the two like fractions:
640/336 + 189/336 = 640 + 189/336 = 829/336
So, 40/21 + 9/16 = 829/336
In mixed form: 2157/336

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