[tex]\bf \cfrac{\stackrel{model}{cm}}{\stackrel{actual}{miles}}\qquad \cfrac{~~12~~}{\frac{2}{3}}\implies \cfrac{12}{1}\cdot \cfrac{3}{2}\implies \cfrac{18}{1}~\hspace{5em}\stackrel{cm}{18}~:~\stackrel{mile}{1}[/tex]
Answer:
18 cm. = 1 mi
Step-by-step explanation:
12/(2/3) mi. = 12 cm. divided by 2/3 mi.
12 cm. divided by 2/3 mi. =
12 cm. times 3/2 mi. = 18 cm./ 1 mi.
So the scale is 18 cm. to 1 mi.