-11.84% is the change from 591 to 521
Calculation steps:
[( 521 - 591 ) ÷ 591] x 100 = -11.84%
Formula
Percentage change = [(521 - 591) / 591] x 100
Subtract the new number by the original number
521 - 591 = -70
-70 ÷ 591 = -0.11844331641285956
-0.11844331641285956 x 100 = -11.84%