-75.4% is the change from 939 to 231
Calculation steps:
[( 231 - 939 ) ÷ 939] x 100 = -75.4%
Formula
Percentage change = [(231 - 939) / 939] x 100
Subtract the new number by the original number
231 - 939 = -708
-708 ÷ 939 = -0.7539936102236422
-0.7539936102236422 x 100 = -75.4%