Add 30/80 and 42/40, Solve 30/80 + 1 2/40 as a fraction

Add 30/80 and 42/40

1^st number: 30/80, 2^nd number: 1 2/40

30/80 + 42/40 is 57/40.

Find the least common denominator or LCM of the two denominators:
LCM of 80 and 40 is 80

Next, find the equivalent fraction of both fractional numbers with denominator 80
For the 1st fraction, since 80 × 1 = 80,
30/80 = 30 × 1/80 × 1 = 30/80
Likewise, for the 2nd fraction, since 40 × 2 = 80,
42/40 = 42 × 2/40 × 2 = 84/80
Add the two like fractions:
30/80 + 84/80 = 30 + 84/80 = 114/80
114/80 simplified gives 57/40
So, 30/80 + 42/40 = 57/40
In mixed form: 117/40

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