Add 72/16 and 90/40, Solve 4 8/16 + 2 10/40 as a fraction

Add 72/16 and 90/40

1^st number: 4 8/16, 2^nd number: 2 10/40

72/16 + 90/40 is 27/4.

Find the least common denominator or LCM of the two denominators:
LCM of 16 and 40 is 80

Next, find the equivalent fraction of both fractional numbers with denominator 80
For the 1st fraction, since 16 × 5 = 80,
72/16 = 72 × 5/16 × 5 = 360/80
Likewise, for the 2nd fraction, since 40 × 2 = 80,
90/40 = 90 × 2/40 × 2 = 180/80
Add the two like fractions:
360/80 + 180/80 = 360 + 180/80 = 540/80
540/80 simplified gives 27/4
So, 72/16 + 90/40 = 27/4
In mixed form: 63/4

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