The fraction of the class is right handed is 7/10
We have given that
80% of the second group are right-handed.
let's turn 80% into a fraction,
What is the fraction form of 80%?
The fraction form of 80% can be calculated by dividing 80 by 100
So we get,
[tex]=\frac{80}{100} \\\\=\frac{8}{10}[/tex]
=8/10.
To get a common denominator let's turn
8/10 =4/5 .....(divide the numerator and denominator by 2)
Since they are both of equal size,
The first group would have 2/5 left-handed people and
The second 1/5 left-handed people.
Let's imagine that each group has 5 people in it.
There would be 10 people in total.
There is 1 person for each fifth so we can add now.
4 + 3 = 7 .....(1)
right handed people.
we can check it,
2 + 1 = 3 and 3 + 7 = 10. .........(2)
Therefore we get,
7/10 of the class is right-handed.
The fraction of the class is right handed is 7/10
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