Add 90/42 and 6/80, Solve 2 6/42 + 6/80 as a fraction

Add 90/42 and 6/80

1^st number: 2 6/42, 2^nd number: 6/80

90/42 + 6/80 is 621/280.

Find the least common denominator or LCM of the two denominators:
LCM of 42 and 80 is 1680

Next, find the equivalent fraction of both fractional numbers with denominator 1680
For the 1st fraction, since 42 × 40 = 1680,
90/42 = 90 × 40/42 × 40 = 3600/1680
Likewise, for the 2nd fraction, since 80 × 21 = 1680,
6/80 = 6 × 21/80 × 21 = 126/1680
Add the two like fractions:
3600/1680 + 126/1680 = 3600 + 126/1680 = 3726/1680
3726/1680 simplified gives 621/280
So, 90/42 + 6/80 = 621/280
In mixed form: 261/280

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