-94.16% is the change from 685 to 40
Calculation steps:
[( 40 - 685 ) ÷ 685] x 100 = -94.16%
Formula
Percentage change = [(40 - 685) / 685] x 100
Subtract the new number by the original number
40 - 685 = -645
-645 ÷ 685 = -0.9416058394160584
-0.9416058394160584 x 100 = -94.16%