Respuesta :
if he received a 28% discount, then he actually paid (100% - 28%) = 72%
72% of 275 = 0.72(275) = $ 198 <===
or this way...
275 - 0.28(275) = 275 - 77 = $ 198 <==
72% of 275 = 0.72(275) = $ 198 <===
or this way...
275 - 0.28(275) = 275 - 77 = $ 198 <==