fraction question

Question

A 4-foot-long submarine sandwich
costs $24. A 6-inch submarine sandwich costs $3.95. How much
money can you save by buying the 4-footer and slicing it into 6-inch
sandwiches?

Answer 1

To work this problem you need to have everything in the same units.  

 

A 4 foot sub would be 48 inches.  (12 inches in 1 foot times 4 feet)

 

To find out how many 6 inch subs can be cut from the 48 inch sub, divide 48 by 6.  You get 8 6 inch subs.

 

If one 6 inch sub costs $3.95 then find the cost of 8, you would multiply $3.95 by 8 and get $31.60.

 

To figure out the savings you would subtract The $24 (cost of 4 foot sub) from $31.60 (cost of 8 6 inch subs) and get 

 

$7.60 which is the savings.

Answer 2

You can get 12  6" sandwiches out of a 4' sub.  (4' = 48".  48/6 is 12.)

 

If you paid $24 and got 12 sandwiches, you paid $2 each.

 

So for each sandwich, you are saving $3.95 - $2, or $1.95 per sandwich.

 

For a total of 12 sandwiches, you have saved 12*$1.95 = $23.40

 

Hope this helps, Mathangi!