-13.74% is the change from 939 to 810
Calculation steps:
[( 810 - 939 ) ÷ 939] x 100 = -13.74%
Formula
Percentage change = [(810 - 939) / 939] x 100
Subtract the new number by the original number
810 - 939 = -129
-129 ÷ 939 = -0.13738019169329074
-0.13738019169329074 x 100 = -13.74%