-50.22% is the change from 679 to 338
Calculation steps:
[( 338 - 679 ) ÷ 679] x 100 = -50.22%
Formula
Percentage change = [(338 - 679) / 679] x 100
Subtract the new number by the original number
338 - 679 = -341
-341 ÷ 679 = -0.5022091310751104
-0.5022091310751104 x 100 = -50.22%