Hey there!!
Let's take the original price of the laptop as $x
Savings you get = $200
This save of $200 is 25% of the original price
If we have have this into an equation..
( 25% ) ( x ) = 200
25% = 25 percent
this would become 25 / 100
Remember =
Per cent = 100
1 dollar = 100 cents , like wise , cent = 100
Moving back on,
( 25 / 100 ) ( x ) = 200
Simplifying 25 / 200
= 1 / 4
( 1 / 4 ) ( x ) = 200
x / 4 = 200
Multiplying by 4 on both sides
x = 800
The original cost = $800
Hope my answer helps!