Question

The stores below each have the same skateboard for an original price of $132.89. At which store can you get the skateboard for the lowest price

Answer 1

The price in store A is:

$(132.89\cdot(1-0.2))\cdot(1-0.2)=(132.89\cdot0.8)\cdot0.8=106.344\cdot0.8=85.0752.$

The price in store B is:

$132.89\cdot(1-0.4)=132.89\cdot0.6=79.734.$

Finally, the price in store C is:

$(132.89\cdot(1-0.3))\cdot(1-0.15)=(132.89\cdot0.7)\cdot0.85=93.023\cdot0.85=79.06955.$

Answer: At store C you can get the skateboard for the lowest price.