Add 45/21 and 40/12, Solve 2 3/21 + 3 4/12 as a fraction

Add 45/21 and 40/12

1^st number: 2 3/21, 2^nd number: 3 4/12

45/21 + 40/12 is 115/21.

Find the least common denominator or LCM of the two denominators:
LCM of 21 and 12 is 84

Next, find the equivalent fraction of both fractional numbers with denominator 84
For the 1st fraction, since 21 × 4 = 84,
45/21 = 45 × 4/21 × 4 = 180/84
Likewise, for the 2nd fraction, since 12 × 7 = 84,
40/12 = 40 × 7/12 × 7 = 280/84
Add the two like fractions:
180/84 + 280/84 = 180 + 280/84 = 460/84
460/84 simplified gives 115/21
So, 45/21 + 40/12 = 115/21
In mixed form: 510/21

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