4. A hat costs $28 after a 30% discount is applied. What was the hats original price?

Please explain if you can. ​

Respuesta :

after a 30% discount, the hat is sold at a price of 70% which is $28.

70% -> $28
1% -> $0.40
100% -> $0.40 x 100
= $40

ans : $40

Answer and Step-by-step explanation:

[tex]The~hat's~original~price~was~40.[/tex]

→ Step - 1 :

[tex]Let~the~original~price~of~the~hat~be~x,~then~the~required~equation[/tex] [tex]becomes:[/tex]

[tex]x=30[/tex]% [tex]of~x=28[/tex]

→  Step - 2 :

[tex]Replace~the~percentage~sign~with~\frac{1}{100}~to~convert ~in~to~an[/tex] [tex]equivalent ~fraction~and~then~evacuate~the~equation:[/tex]

[tex]x-30[/tex] × [tex]\frac{1}{100}[/tex] × [tex]x=28[/tex]

→ Step - 3 :

⇒ [tex]Simplify: x-0.3x=28[/tex]

                  [tex]0.7x=28[/tex]

⇒ [tex]Evacuate~x: x=\frac{28}{0.7}[/tex]

⇒ [tex]Simplify: x=40[/tex]

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