-93.58% is the change from 623 to 40
Calculation steps:
[( 40 - 623 ) ÷ 623] x 100 = -93.58%
Formula
Percentage change = [(40 - 623) / 623] x 100
Subtract the new number by the original number
40 - 623 = -583
-583 ÷ 623 = -0.9357945425361156
-0.9357945425361156 x 100 = -93.58%