Laura has $80 saved for a new laptop. This is 20% of the total amount she needs for the laptop. How much does the new laptop cost?
ASHLEY BORROWED 3 BOOKS FROM THE LIBRARY. THIS WAS 25% SHE CHECKED OUT. HOW MANY BOOKS DID SHE CHECK OUT
.2 x = 80
x = 80/.2 = 800/2 = 400
.25 x = 3
x = 300/25 = 12
To find out how much the new laptop costs, we need to set up an equation using the given information.
Let's assume the total cost of the laptop is represented by 'x'.
According to the information, Laura has saved 20% of the total cost ($x) which amounts to $80.
We can express this information in an equation: 20% of x = $80.
To solve for 'x', we need to convert the percentage into a decimal. 20% is equivalent to 0.20.
The equation becomes: 0.20x = $80.
To isolate 'x', we divide both sides of the equation by 0.20:
0.20x / 0.20 = $80 / 0.20.
Simplifying:
x = $400.
Therefore, the new laptop costs $400.