Add 21/6 and 30/80, Solve 3 3/6 + 30/80 as a fraction

Add 21/6 and 30/80

1^st number: 3 3/6, 2^nd number: 30/80

21/6 + 30/80 is 31/8.

Find the least common denominator or LCM of the two denominators:
LCM of 6 and 80 is 240

Next, find the equivalent fraction of both fractional numbers with denominator 240
For the 1st fraction, since 6 × 40 = 240,
21/6 = 21 × 40/6 × 40 = 840/240
Likewise, for the 2nd fraction, since 80 × 3 = 240,
30/80 = 30 × 3/80 × 3 = 90/240
Add the two like fractions:
840/240 + 90/240 = 840 + 90/240 = 930/240
930/240 simplified gives 31/8
So, 21/6 + 30/80 = 31/8
In mixed form: 37/8

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