-83.27% is the change from 538 to 90
Calculation steps:
[( 90 - 538 ) ÷ 538] x 100 = -83.27%
Formula
Percentage change = [(90 - 538) / 538] x 100
Subtract the new number by the original number
90 - 538 = -448
-448 ÷ 538 = -0.8327137546468402
-0.8327137546468402 x 100 = -83.27%