$$80\div40\textbackslash\%=200$$．  so choose $$\text{B}$$． 
Happy Hotel is offering $$40 \textbackslash\%$$ off discount for any bookings. David booked a room, the new price is $$80$$ dollars cheaper than the original price, what was the original price． 

[a] $$180$$ 
[b] $$200$$ 
[c] $$300$$ 
[d] $$480$$ 