Add 9/18 and 32/21, Solve 9/18 + 1 11/21 as a fraction

Add 9/18 and 32/21

1^st number: 9/18, 2^nd number: 1 11/21

9/18 + 32/21 is 85/42.

Find the least common denominator or LCM of the two denominators:
LCM of 18 and 21 is 126

Next, find the equivalent fraction of both fractional numbers with denominator 126
For the 1st fraction, since 18 × 7 = 126,
9/18 = 9 × 7/18 × 7 = 63/126
Likewise, for the 2nd fraction, since 21 × 6 = 126,
32/21 = 32 × 6/21 × 6 = 192/126
Add the two like fractions:
63/126 + 192/126 = 63 + 192/126 = 255/126
255/126 simplified gives 85/42
So, 9/18 + 32/21 = 85/42
In mixed form: 21/42

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