-52.63% is the change from 190 to 90
Calculation steps:
[( 90 - 190 ) ÷ 190] x 100 = -52.63%
Formula
Percentage change = [(90 - 190) / 190] x 100
Subtract the new number by the original number
90 - 190 = -100
-100 ÷ 190 = -0.5263157894736842
-0.5263157894736842 x 100 = -52.63%