A backpack that sells for $42.00 is on sale for 25% off.

How much money will you save?

$10.50

Step-by-step explanation:

To find how much is off the regular price, we need to convert the percent into a decimal. 25% is the same as .25

42 • .25= 10.50

(or 42 times .25 equals 10.50)

Thus, we save $10.50

to determine the unit cost your would divide the total cost by the number sold.

7 bagels for $4.41       $4.41/7 = $.63 each at fresh side

5 bagels for $3.60         $3.60/5 = $.72 each at value mart