-71.24% is the change from 591 to 170
Calculation steps:
[( 170 - 591 ) ÷ 591] x 100 = -71.24%
Formula
Percentage change = [(170 - 591) / 591] x 100
Subtract the new number by the original number
170 - 591 = -421
-421 ÷ 591 = -0.7123519458544839
-0.7123519458544839 x 100 = -71.24%