-10.5% is the change from 581 to 520
Calculation steps:
[( 520 - 581 ) ÷ 581] x 100 = -10.5%
Formula
Percentage change = [(520 - 581) / 581] x 100
Subtract the new number by the original number
520 - 581 = -61
-61 ÷ 581 = -0.10499139414802065
-0.10499139414802065 x 100 = -10.5%