Question

The following graph shows the percent of students whotake each foreign language class in high school. Thereare a total of 780 students.Foreign Languages Studied10%5%30%EFrench 3096Italian 10%German 5%Spanish 55%55%How many MORE students take french than Italian?

Answer 1

Recall that the are 780 students in total.

We want to calculate how many more students take french than Italian. So, what we will do is calculate the percentage difference between this two groups and then translate that percentage to a number of students.

We see that 30% of the student take french and 10% take italian. So, the percentage difference between this groups is

`30\text{ - 10 =20}`

so, 20% more students take french than italian.

Now we want to translate the 20% to the number of students. So, we will multiply this 20% by 780 to calculate the number of student.

So we get

`780\cdot(20)/(100)=156`