-48.4% is the change from 657 to 339
Calculation steps:
[( 339 - 657 ) ÷ 657] x 100 = -48.4%
Formula
Percentage change = [(339 - 657) / 657] x 100
Subtract the new number by the original number
339 - 657 = -318
-318 ÷ 657 = -0.4840182648401826
-0.4840182648401826 x 100 = -48.4%