-16.64% is the change from 613 to 511
Calculation steps:
[( 511 - 613 ) ÷ 613] x 100 = -16.64%
Formula
Percentage change = [(511 - 613) / 613] x 100
Subtract the new number by the original number
511 - 613 = -102
-102 ÷ 613 = -0.16639477977161501
-0.16639477977161501 x 100 = -16.64%