Posted by Lilly on .
a 50 pound bag of glossy coat horse feed cost $23.50. A 25 pound bag cost $15.50. How much money per pound would you save by buying the bag with the lower unit price?

math 
jai,
you have to solve for amount per pound of each:
23.5/50 = ?
15.5/25 = ?
then subtract the answers you got to get the amount per pound that can be saved by buying the lower unit price.
hope this helps. :) 
math 
Lilly,
4oes 23.5/50 = 0.47;

math 
jai,
right. :)
how about 15.5/25 = ? 
math 
Lilly,
0.62?

math 
jai,
right. :)
now, subtract them to get amount per pound that can be saved. 
math 
Lilly,
0.14 punds?

math 
Lilly,
0.15*

math 
jai,
right. :)
but since it's amount per pound, the units must be in dollars/pound.