-82.92% is the change from 527 to 90
Calculation steps:
[( 90 - 527 ) ÷ 527] x 100 = -82.92%
Formula
Percentage change = [(90 - 527) / 527] x 100
Subtract the new number by the original number
90 - 527 = -437
-437 ÷ 527 = -0.8292220113851992
-0.8292220113851992 x 100 = -82.92%