Add 21/80 and 45/6, Solve 21/80 + 7 3/6 as a fraction

Add 21/80 and 45/6

1^st number: 21/80, 2^nd number: 7 3/6

21/80 + 45/6 is 621/80.

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

Next, find the equivalent fraction of both fractional numbers with denominator 240
For the 1st fraction, since 80 × 3 = 240,
21/80 = 21 × 3/80 × 3 = 63/240
Likewise, for the 2nd fraction, since 6 × 40 = 240,
45/6 = 45 × 40/6 × 40 = 1800/240
Add the two like fractions:
63/240 + 1800/240 = 63 + 1800/240 = 1863/240
1863/240 simplified gives 621/80
So, 21/80 + 45/6 = 621/80
In mixed form: 761/80

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