CPM Homework Help : MC1 Problem 10-101

Linnea and Teagan went shopping. Linnea bought a $$70$ coat at $30\%$ off and an $$80$ pair of shoes at $40\%$ off. Teagan bought a $$70$ pair of shoes at $40\%$ off and an $$80$ coat at $30\%$ off. Who spent more? How much more?

Hint:

Calculate how much Linnea spent.

Step 1:

If something is 30% off, that means you pay $70\%$ .
$10\%$ of $$70$ is $$7$
$70\% = 7\left(10\%\right)$
$70\%$ of $$70 = 7\left($7\right) = $49$
Linnea bought her coat for $$49$ .

Step 2:

If something is $40\%$ off, that means you pay $60\%$ .
$10\%$ of $$80$ is $$8$
$60\% = 6\left(10\%\right)$
$60\%$ of $$80 = 6\left($8\right) = $48$
Linnea bought her shoes for $$48$ .

Step 3:

Linnea spent $$48 + $49 = $90$ . See if you can use the same method to find out how much money Teagan spent.