lina5734
lina5734 lina5734
  • 02-12-2019
  • Mathematics
contestada

A backpack is normally $64.99,but sale,it is marked down to $45.49.what percent off is the sale price?

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ReimannZeta
ReimannZeta ReimannZeta
  • 04-12-2019

Answer:

30%

Step-by-step explanation:

Here we want to setup the equation

[tex]y = a - (a\times x)[/tex]

where y is the discounted price, a is the normal price and x is the percent off. so now we wanna plug in known values and solve for percent off.

[tex]45.49 = 64.99 - (64.99x)[/tex]

through algebra,

[tex] - 19.5 = - (64.99x)[/tex]

[tex] \frac{ - 19.5}{ - 64.99} = x[/tex]

[tex]x = .3000...[/tex]

so in percentage that is 30%

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