-7.55% is the change from 530 to 490
Calculation steps:
[( 490 - 530 ) ÷ 530] x 100 = -7.55%
Formula
Percentage change = [(490 - 530) / 530] x 100
Subtract the new number by the original number
490 - 530 = -40
-40 ÷ 530 = -0.07547169811320754
-0.07547169811320754 x 100 = -7.55%