Add 3/84 and 90/7, Solve 3/84 + 12 6/7 as a fraction

Add 3/84 and 90/7

1^st number: 3/84, 2^nd number: 12 6/7

3/84 + 90/7 is 361/28.

Find the least common denominator or LCM of the two denominators:
LCM of 84 and 7 is 84

Next, find the equivalent fraction of both fractional numbers with denominator 84
For the 1st fraction, since 84 × 1 = 84,
3/84 = 3 × 1/84 × 1 = 3/84
Likewise, for the 2nd fraction, since 7 × 12 = 84,
90/7 = 90 × 12/7 × 12 = 1080/84
Add the two like fractions:
3/84 + 1080/84 = 3 + 1080/84 = 1083/84
1083/84 simplified gives 361/28
So, 3/84 + 90/7 = 361/28
In mixed form: 1225/28

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