Add 90/14 and 40/12, Solve 6 6/14 + 3 4/12 as a fraction

Add 90/14 and 40/12

1^st number: 6 6/14, 2^nd number: 3 4/12

90/14 + 40/12 is 205/21.

Find the least common denominator or LCM of the two denominators:
LCM of 14 and 12 is 84

Next, find the equivalent fraction of both fractional numbers with denominator 84
For the 1st fraction, since 14 × 6 = 84,
90/14 = 90 × 6/14 × 6 = 540/84
Likewise, for the 2nd fraction, since 12 × 7 = 84,
40/12 = 40 × 7/12 × 7 = 280/84
Add the two like fractions:
540/84 + 280/84 = 540 + 280/84 = 820/84
820/84 simplified gives 205/21
So, 90/14 + 40/12 = 205/21
In mixed form: 916/21

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