-47.11% is the change from 641 to 339
Calculation steps:
[( 339 - 641 ) ÷ 641] x 100 = -47.11%
Formula
Percentage change = [(339 - 641) / 641] x 100
Subtract the new number by the original number
339 - 641 = -302
-302 ÷ 641 = -0.4711388455538221
-0.4711388455538221 x 100 = -47.11%