-97.91% is the change from 909 to 19
Calculation steps:
[( 19 - 909 ) ÷ 909] x 100 = -97.91%
Formula
Percentage change = [(19 - 909) / 909] x 100
Subtract the new number by the original number
19 - 909 = -890
-890 ÷ 909 = -0.9790979097909791
-0.9790979097909791 x 100 = -97.91%