Question

If a dose of 100 milligrams is in 8 tablets, how many tablets are in 40 milligrams?

Answer 1

$\bf \begin{array}{ccll} milligrams&tablets\\ \text{\textemdash\textemdash\textemdash}&\text{\textemdash\textemdash\textemdash}\\ 100&8\\ 40&t \end{array}\implies \cfrac{100}{40}=\cfrac{8}{t}\implies t=\cfrac{40\cdot 8}{100}$