100
Which price is the least expressive?
(a) The sale price of a dress marked 30% off.
(b) The sale price of a dress marked 1/3 off.
(c) The sale price of a dress marked 10% off and then 20% off the lower price.
What is b - 1/3 off would yield the least expensive amount.
(a) if the dress was $100 then if is was 30% off the cost would be $100 - $30 = $70 (30% of 100 =.30 x 100 = 30)
(b) 1/3 equals .333, so if the dress was $100, then 1/3 off would be $100 - $33.33 = $66.70 (1/3 of 100 =.333 x 100)
(c) 10% of 100 = $10 and 20% of $90 = $18 so
100-10 = 90 and 90 - 18 =$72