AAA Company currently sells radios for $ 80 less 25 % . Their competitors are now selling the same product for $ 48 . AAA must offer an additional discount of _____ in order to meet their competitor's price. A single discount of _____ will give the same net price.

(a) 10.00 % ; 60.00 % (b) 20.00 % ; 40.00 %
(c) 10.00 % ; 40.00 % (d) 20.00 % ; 60.00 %

I am not asking for the answer i just need help to figure out how to get to the answer like is there some sort of formula to figure it out or what strategy can i use to figure it out please help me.

addition discount x %

.75(80)(1-x) = 48
60 - 60x = 48
-60x = -12
x = -12/-60 = .20

They have to offer another 2-%

check: (.75)(.8)(80) =48