-14.8% is the change from 939 to 800
Calculation steps:
[( 800 - 939 ) ÷ 939] x 100 = -14.8%
Formula
Percentage change = [(800 - 939) / 939] x 100
Subtract the new number by the original number
800 - 939 = -139
-139 ÷ 939 = -0.14802981895633652
-0.14802981895633652 x 100 = -14.8%