-70.74% is the change from 581 to 170
Calculation steps:
[( 170 - 581 ) ÷ 581] x 100 = -70.74%
Formula
Percentage change = [(170 - 581) / 581] x 100
Subtract the new number by the original number
170 - 581 = -411
-411 ÷ 581 = -0.7074010327022375
-0.7074010327022375 x 100 = -70.74%