-81.56% is the change from 488 to 90
Calculation steps:
[( 90 - 488 ) ÷ 488] x 100 = -81.56%
Formula
Percentage change = [(90 - 488) / 488] x 100
Subtract the new number by the original number
90 - 488 = -398
-398 ÷ 488 = -0.8155737704918032
-0.8155737704918032 x 100 = -81.56%