-51.85% is the change from 189 to 91
Calculation steps:
[( 91 - 189 ) ÷ 189] x 100 = -51.85%
Formula
Percentage change = [(91 - 189) / 189] x 100
Subtract the new number by the original number
91 - 189 = -98
-98 ÷ 189 = -0.5185185185185185
-0.5185185185185185 x 100 = -51.85%