-40.57% is the change from 530 to 315
Calculation steps:
[( 315 - 530 ) ÷ 530] x 100 = -40.57%
Formula
Percentage change = [(315 - 530) / 530] x 100
Subtract the new number by the original number
315 - 530 = -215
-215 ÷ 530 = -0.4056603773584906
-0.4056603773584906 x 100 = -40.57%