-20% is the change from 205 to 164
Calculation steps:
[( 164 - 205 ) ÷ 205] x 100 = -20%
Formula
Percentage change = [(164 - 205) / 205] x 100
Subtract the new number by the original number
164 - 205 = -41
-41 ÷ 205 = -0.2
-0.2 x 100 = -20%
Example