400% is the change from 161 to 805
Calculation steps:
[( 805 - 161 ) ÷ 161] x 100 = 400%
Formula
Percentage change = [(805 - 161) / 161] x 100
Subtract the new number by the original number
805 - 161 = 644
644 ÷ 161 = 4
4 x 100 = 400%
Example