-0.98% is the change from 511 to 506
Calculation steps:
[( 506 - 511 ) ÷ 511] x 100 = -0.98%
Formula
Percentage change = [(506 - 511) / 511] x 100
Subtract the new number by the original number
506 - 511 = -5
-5 ÷ 511 = -0.009784735812133072
-0.009784735812133072 x 100 = -0.98%