-21.01% is the change from 909 to 718
Calculation steps:
[( 718 - 909 ) ÷ 909] x 100 = -21.01%
Formula
Percentage change = [(718 - 909) / 909] x 100
Subtract the new number by the original number
718 - 909 = -191
-191 ÷ 909 = -0.21012101210121012
-0.21012101210121012 x 100 = -21.01%