Question

Priya's family exchanged 250 dollars for 4,250 pesos. Priya bout a sweater fo 510 pesos. How many dollars did the sweater cost?

Answer 1

30 dollars.

1 dollar = 17 pesos.

510 ÷ 17 =30

Answer 2

$\bf \begin{array}{ccll} dollars&pesos\\ \cline{1-2} 250&4250\\ d&510 \end{array}\implies \cfrac{250}{d}=\cfrac{4250}{510}\implies \cfrac{250\cdot 510}{4250}=d\implies 30=d$