Add 28/5 and 90/80, Solve 5 3/5 + 1 10/80 as a fraction

Add 28/5 and 90/80

1^st number: 5 3/5, 2^nd number: 1 10/80

28/5 + 90/80 is 269/40.

Find the least common denominator or LCM of the two denominators:
LCM of 5 and 80 is 80

Next, find the equivalent fraction of both fractional numbers with denominator 80
For the 1st fraction, since 5 × 16 = 80,
28/5 = 28 × 16/5 × 16 = 448/80
Likewise, for the 2nd fraction, since 80 × 1 = 80,
90/80 = 90 × 1/80 × 1 = 90/80
Add the two like fractions:
448/80 + 90/80 = 448 + 90/80 = 538/80
538/80 simplified gives 269/40
So, 28/5 + 90/80 = 269/40
In mixed form: 629/40

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