-85.12% is the change from 645 to 96
Calculation steps:
[( 96 - 645 ) ÷ 645] x 100 = -85.12%
Formula
Percentage change = [(96 - 645) / 645] x 100
Subtract the new number by the original number
96 - 645 = -549
-549 ÷ 645 = -0.8511627906976744
-0.8511627906976744 x 100 = -85.12%