-52.11% is the change from 190 to 91
Calculation steps:
[( 91 - 190 ) ÷ 190] x 100 = -52.11%
Formula
Percentage change = [(91 - 190) / 190] x 100
Subtract the new number by the original number
91 - 190 = -99
-99 ÷ 190 = -0.5210526315789473
-0.5210526315789473 x 100 = -52.11%