-18.5% is the change from 200 to 163
Calculation steps:
[( 163 - 200 ) ÷ 200] x 100 = -18.5%
Formula
Percentage change = [(163 - 200) / 200] x 100
Subtract the new number by the original number
163 - 200 = -37
-37 ÷ 200 = -0.185
-0.185 x 100 = -18.5%