-18.69% is the change from 198 to 161
Calculation steps:
[( 161 - 198 ) ÷ 198] x 100 = -18.69%
Formula
Percentage change = [(161 - 198) / 198] x 100
Subtract the new number by the original number
161 - 198 = -37
-37 ÷ 198 = -0.18686868686868688
-0.18686868686868688 x 100 = -18.69%