-6.31% is the change from 555 to 520
Calculation steps:
[( 520 - 555 ) ÷ 555] x 100 = -6.31%
Formula
Percentage change = [(520 - 555) / 555] x 100
Subtract the new number by the original number
520 - 555 = -35
-35 ÷ 555 = -0.06306306306306306
-0.06306306306306306 x 100 = -6.31%