Select Proportional or Not Proportional to correctly classify each pair of ratios. Proportional Not Proportional 12/30 and 18/45

O O

12/30 = 18/45 ... cross multiply

(30) (18) = (12) (45)

540 = 540 ... proportional

another way to tell is to see if they are equivalent ... because proportions are nothing but equivalent fractions.

12/30 = 2/5

18/45 = 2/5

so yes, they are proportional