batteries which normally sell for $1.89 a pack are on sale for $3.40 for two packs. approximately what percentage markdown does this represent per pack?
Normally, two packs of batteries cost $1.89*2=$3.78. The discounted price of $3.40 divided by the standard price of $3.78 for two packs is approximately .9, or 90 percent. Therefore, we have an approximately ten percent discount with the sale.