suppose that 15 inches of wire costs 60 cents at the same rate how much (in cents ) will 47 inches of wire costs ?

 

suppose that 15 inches of wire costs 60 cents at the same rate how much (in cents ) will 47 inches of wire costs ?     

 

First find the cost of the wire in cents per inch 

When you see "per" in a proposition it always means divide                    60 ¢ 

                                                                                                                ––––  =  4 ¢/in  

                                                                                                                15 in  

 

Now multiply the cost in ¢/in times 47 in                                                   4 ¢/n • 47 in  =  188 ¢  or  $1.88  

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