Question

Samuel has a collection of toy cars his favorite are the 27 red ones which make up 60 percent of his collection.how many cars does Samuel have?

Answer 1

27/60 = 0.45
0.45 * 100 = 45

Samuel has 45 toy cars

Answer 2

he has "x" total, so if "x" is the 100%, and 27 is the 60%, what's "x"?

well  $\bf \begin{array}{ccllll} amount&\%\\ \text{\textemdash\textemdash\textemdash}&\text{\textemdash\textemdash\textemdash}\\ x&100\\ 27&60 \end{array}\implies \cfrac{x}{27}=\cfrac{100}{60}$

solve for "x".