-65.35% is the change from 909 to 315
Calculation steps:
[( 315 - 909 ) ÷ 909] x 100 = -65.35%
Formula
Percentage change = [(315 - 909) / 909] x 100
Subtract the new number by the original number
315 - 909 = -594
-594 ÷ 909 = -0.6534653465346535
-0.6534653465346535 x 100 = -65.35%