-12.01% is the change from 591 to 520
Calculation steps:
[( 520 - 591 ) ÷ 591] x 100 = -12.01%
Formula
Percentage change = [(520 - 591) / 591] x 100
Subtract the new number by the original number
520 - 591 = -71
-71 ÷ 591 = -0.12013536379018612
-0.12013536379018612 x 100 = -12.01%