Add 70/42 and 90/27, Solve 1 28/42 + 3 9/27 as a fraction

Add 70/42 and 90/27

1^st number: 1 28/42, 2^nd number: 3 9/27

70/42 + 90/27 is 5/1.

Find the least common denominator or LCM of the two denominators:
LCM of 42 and 27 is 378

Next, find the equivalent fraction of both fractional numbers with denominator 378
For the 1st fraction, since 42 × 9 = 378,
70/42 = 70 × 9/42 × 9 = 630/378
Likewise, for the 2nd fraction, since 27 × 14 = 378,
90/27 = 90 × 14/27 × 14 = 1260/378
Add the two like fractions:
630/378 + 1260/378 = 630 + 1260/378 = 1890/378
1890/378 simplified gives 5/1
So, 70/42 + 90/27 = 5/1

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