Hi(๑ت๑)ノ
We need to find the percentage to find what is the N. In finding the percentage, we'll have to multiply the rate and base using the Techan's Triangle.
Given:
Rate: 20%
Base: 40
Solution:
P = Rate × Base
P = 20% × 40
P = 0.20 × 40
P = 8
40 is 20% of 8.