-69.7% is the change from 561 to 170
Calculation steps:
[( 170 - 561 ) ÷ 561] x 100 = -69.7%
Formula
Percentage change = [(170 - 561) / 561] x 100
Subtract the new number by the original number
170 - 561 = -391
-391 ÷ 561 = -0.696969696969697
-0.696969696969697 x 100 = -69.7%