-82.73% is the change from 527 to 91
Calculation steps:
[( 91 - 527 ) ÷ 527] x 100 = -82.73%
Formula
Percentage change = [(91 - 527) / 527] x 100
Subtract the new number by the original number
91 - 527 = -436
-436 ÷ 527 = -0.8273244781783681
-0.8273244781783681 x 100 = -82.73%