-50% is the change from 190 to 95
Calculation steps:
[( 95 - 190 ) ÷ 190] x 100 = -50%
Formula
Percentage change = [(95 - 190) / 190] x 100
Subtract the new number by the original number
95 - 190 = -95
-95 ÷ 190 = -0.5
-0.5 x 100 = -50%
Example