Discount 65854

The TV fell first by 20%, then by 10%. How much did it cost after the second discount if:
A) before the first discount cost 450eur?
B) after the first discount, cost 450eur?

Correct answer:

a =  324
b =  405

Step-by-step explanation:

q1=100%20%=110020=0.8 q2=100%10%=110010=0.9  a=450 q1 q2=450 0.8 0.9=324
b=450 q2=450 0.9=405

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