Question

Dante drove 405 miles using 20 gallons of gas.At this rate,how many gallons of gas would he need to drive 243 miles

Answer 1

$\begin{array}{ccll} miles&gallons\\ \cline{1-2} 405&20\\ 243&g \end{array}\implies \cfrac{405}{243}=\cfrac{20}{g}\implies \cfrac{5}{3}=\cfrac{20}{g}\implies 5g=60 \\\\\\ g = \cfrac{60}{5}\implies g = 12$

Answer 2

Answer:

12

Step-by-step explanation:

405:20

81:4

243:12