400% is the change from 165 to 825
Calculation steps:
[( 825 - 165 ) ÷ 165] x 100 = 400%
Formula
Percentage change = [(825 - 165) / 165] x 100
Subtract the new number by the original number
825 - 165 = 660
660 ÷ 165 = 4
4 x 100 = 400%
Example