-64.91% is the change from 909 to 319
Calculation steps:
[( 319 - 909 ) ÷ 909] x 100 = -64.91%
Formula
Percentage change = [(319 - 909) / 909] x 100
Subtract the new number by the original number
319 - 909 = -590
-590 ÷ 909 = -0.6490649064906491
-0.6490649064906491 x 100 = -64.91%