-50.37% is the change from 683 to 339
Calculation steps:
[( 339 - 683 ) ÷ 683] x 100 = -50.37%
Formula
Percentage change = [(339 - 683) / 683] x 100
Subtract the new number by the original number
339 - 683 = -344
-344 ÷ 683 = -0.5036603221083455
-0.5036603221083455 x 100 = -50.37%