-8.52% is the change from 939 to 859
Calculation steps:
[( 859 - 939 ) ÷ 939] x 100 = -8.52%
Formula
Percentage change = [(859 - 939) / 939] x 100
Subtract the new number by the original number
859 - 939 = -80
-80 ÷ 939 = -0.08519701810436635
-0.08519701810436635 x 100 = -8.52%