Question

In a class of 20 students, 40% of them have a pet how many students have a pet

Answer 1

20 students represent 100% of the class, to find how many students are 40% of the class, we can use the next proportion:

`\frac{20\text{ students}}{x\text{ students}}=\frac{100\text{ \%}}{40\text{ \%}}`

Solving for x,

`\begin{gathered} 20\cdot40=100\cdot x \\ (800)/(100)=x \\ 8=x \end{gathered}`

8 students have a pet