-93.83% is the change from 648 to 40
Calculation steps:
[( 40 - 648 ) ÷ 648] x 100 = -93.83%
Formula
Percentage change = [(40 - 648) / 648] x 100
Subtract the new number by the original number
40 - 648 = -608
-608 ÷ 648 = -0.9382716049382716
-0.9382716049382716 x 100 = -93.83%