-31.3% is the change from 591 to 406
Calculation steps:
[( 406 - 591 ) ÷ 591] x 100 = -31.3%
Formula
Percentage change = [(406 - 591) / 591] x 100
Subtract the new number by the original number
406 - 591 = -185
-185 ÷ 591 = -0.3130287648054145
-0.3130287648054145 x 100 = -31.3%