-73.1% is the change from 591 to 159
Calculation steps:
[( 159 - 591 ) ÷ 591] x 100 = -73.1%
Formula
Percentage change = [(159 - 591) / 591] x 100
Subtract the new number by the original number
159 - 591 = -432
-432 ÷ 591 = -0.7309644670050761
-0.7309644670050761 x 100 = -73.1%