-67.68% is the change from 591 to 191
Calculation steps:
[( 191 - 591 ) ÷ 591] x 100 = -67.68%
Formula
Percentage change = [(191 - 591) / 591] x 100
Subtract the new number by the original number
191 - 591 = -400
-400 ÷ 591 = -0.676818950930626
-0.676818950930626 x 100 = -67.68%