Dylan`s Proportion post

Part 1
Ratios : compares two thing that are the same
 eg.  5:8  games:players
Rate : compares two quantities of different kinds in different units of measure
eg. 100m per minute =1000m per ten minutes 
Proportion : A statement which states the two ratios are equal 
2:5 = 4:10

Part 2
Ratio: there are 50 black cars and 10 sliver cars how many black cars to sliver in lowest terms 
 50:10 = 5:1
Rate : whats the best buy 500 ml for 5$ 700 ml for 8$

ml            $                             ml            $
500          5                            700           8    
100          1                        87.5              1
                                                
number 1 is the best buy

Proportion : which are equal 
a.  2:6 = 4:12    b. 8:9 = 2:5
c.   3:9 = 1:4     d. 12:24 = 1:2
D is the equal ratios