-70.4% is the change from 581 to 172
Calculation steps:
[( 172 - 581 ) ÷ 581] x 100 = -70.4%
Formula
Percentage change = [(172 - 581) / 581] x 100
Subtract the new number by the original number
172 - 581 = -409
-409 ÷ 581 = -0.7039586919104991
-0.7039586919104991 x 100 = -70.4%