Explanation:

4 - Percentage

5 - Base

80 % - Rate

Check mo gamit ang formula na:

Percentage = Base × Rate

CHECK:

P = 5 × .80

P = 4

B = 4 ÷ .80

B = 5

R = 4 ÷ 5

R = 0.8 × 100

R = 80%