-85.49% is the change from 641 to 93
Calculation steps:
[( 93 - 641 ) ÷ 641] x 100 = -85.49%
Formula
Percentage change = [(93 - 641) / 641] x 100
Subtract the new number by the original number
93 - 641 = -548
-548 ÷ 641 = -0.8549141965678627
-0.8549141965678627 x 100 = -85.49%