-73.77% is the change from 591 to 155
Calculation steps:
[( 155 - 591 ) ÷ 591] x 100 = -73.77%
Formula
Percentage change = [(155 - 591) / 591] x 100
Subtract the new number by the original number
155 - 591 = -436
-436 ÷ 591 = -0.7377326565143824
-0.7377326565143824 x 100 = -73.77%