-18.87% is the change from 530 to 430
Calculation steps:
[( 430 - 530 ) ÷ 530] x 100 = -18.87%
Formula
Percentage change = [(430 - 530) / 530] x 100
Subtract the new number by the original number
430 - 530 = -100
-100 ÷ 530 = -0.18867924528301888
-0.18867924528301888 x 100 = -18.87%