Answer:
see below
Step-by-step explanation:
The regular cost for 3 chairs is 3 * 128 = 384
The discount on the third chair is 3/4 off or you pay 1/4
128 * 1/4 = 32
The cost for the chairs with the discount is
128 + 128+ 32 =288
The percent discount is
(384-288)/384 = .25
He got 25% off each chair
128 * .25 =32
128-32 = 96
He pays 96 dollars for each chair
