A cell phone is on sale for $180. It originally cost $200. What percent off is the sale offering?
( 200 - 180 ) / 200 • 100% =
20 / 200 • 100% = 0.1 • 100% = 10%
OR
Difference of prices = $200 - $180 = $20
$20 is 10% of $200
20 / 200 • 100% = 0.1 • 100% = 10%
OR
Difference of prices = $200 - $180 = $20
$20 is 10% of $200