Question

In Mrs Fishers first pd. class, 7 students did not complete their hw, this was 35% of their class, how many students are in her class?

Answer 1

Answer:

Mrs Fishers has 20 students in her class.

Step-by-step explanation:

This problem can be written in the proportion $\frac{35}{100}$ = $\frac{7}{x}$ because $\frac{35}{100}$ is 35%, which is equal to $\frac{7}{x}$ because that is also 35%.

$\frac{35}{100}$ = $\frac{7}{x}$ --- write proportion

35x = 700 --- cross multiply (multiply x by 35 and 7 by 100)

x = 20 --- divide both sides by 35.