-70.9% is the change from 859 to 250
Calculation steps:
[( 250 - 859 ) ÷ 859] x 100 = -70.9%
Formula
Percentage change = [(250 - 859) / 859] x 100
Subtract the new number by the original number
250 - 859 = -609
-609 ÷ 859 = -0.7089639115250291
-0.7089639115250291 x 100 = -70.9%