-84.13% is the change from 189 to 30
Calculation steps:
[( 30 - 189 ) ÷ 189] x 100 = -84.13%
Formula
Percentage change = [(30 - 189) / 189] x 100
Subtract the new number by the original number
30 - 189 = -159
-159 ÷ 189 = -0.8412698412698413
-0.8412698412698413 x 100 = -84.13%