-3.58% is the change from 530 to 511
Calculation steps:
[( 511 - 530 ) ÷ 530] x 100 = -3.58%
Formula
Percentage change = [(511 - 530) / 530] x 100
Subtract the new number by the original number
511 - 530 = -19
-19 ÷ 530 = -0.035849056603773584
-0.035849056603773584 x 100 = -3.58%