-95.96% is the change from 990 to 40
Calculation steps:
[( 40 - 990 ) ÷ 990] x 100 = -95.96%
Formula
Percentage change = [(40 - 990) / 990] x 100
Subtract the new number by the original number
40 - 990 = -950
-950 ÷ 990 = -0.9595959595959596
-0.9595959595959596 x 100 = -95.96%