Add 84/45 and 12/7, Solve 1 39/45 + 1 5/7 as a fraction

Add 84/45 and 12/7

1^st number: 1 39/45, 2^nd number: 1 5/7

84/45 + 12/7 is 376/105.

Find the least common denominator or LCM of the two denominators:
LCM of 45 and 7 is 315

Next, find the equivalent fraction of both fractional numbers with denominator 315
For the 1st fraction, since 45 × 7 = 315,
84/45 = 84 × 7/45 × 7 = 588/315
Likewise, for the 2nd fraction, since 7 × 45 = 315,
12/7 = 12 × 45/7 × 45 = 540/315
Add the two like fractions:
588/315 + 540/315 = 588 + 540/315 = 1128/315
1128/315 simplified gives 376/105
So, 84/45 + 12/7 = 376/105
In mixed form: 361/105

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