Derek is placing a text-based dialog box in a specific location in the gameplay area. If he multiplies the screen. width variable by 0.8, the placement will be at what percentage from the right side of the screen?

To find the percentage from the right side of the screen, we can use the formula:

Percentage from right side = (1 - placement / screen width) * 100

Given that Derek is multiplying the screen width by 0.8, this means the placement will be at 80% of the screen width.

So, the percentage from the right side of the screen would be:

(1 - 0.80) * 100 = 20%

Therefore, the placement will be at 20% from the right side of the screen.