Question

A radio is being discounted 20%.if the is sale of the radio is $51.44, what was the original price of the radio?

Answer 1

51.44 ÷ 0.8 = 64.3

So the original price was $64.30

Answer 2

The Definition of Porcentage is given by:


`p= (V_(x))/(V_(t))`

Where Vx is discounted value or increased, and Vt is total value. The discount decreases the "p" value.


`p= (V_(x))/(V_(t)) \\ ((100-20))/(100V_(x)) = (1)/(V_(t)) \\ V_(t)= (51.44)/(0.8) \\ \boxed {V_(x)=64.3}`

If you notice any mistake in my english, please let me know, because i am not native.