Add 90/80 and 5/4, Solve 1 10/80 + 1 1/4 as a fraction

Add 90/80 and 5/4

1^st number: 1 10/80, 2^nd number: 1 1/4

90/80 + 5/4 is 19/8.

Find the least common denominator or LCM of the two denominators:
LCM of 80 and 4 is 80

Next, find the equivalent fraction of both fractional numbers with denominator 80
For the 1st fraction, since 80 × 1 = 80,
90/80 = 90 × 1/80 × 1 = 90/80
Likewise, for the 2nd fraction, since 4 × 20 = 80,
5/4 = 5 × 20/4 × 20 = 100/80
Add the two like fractions:
90/80 + 100/80 = 90 + 100/80 = 190/80
190/80 simplified gives 19/8
So, 90/80 + 5/4 = 19/8
In mixed form: 23/8

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