-47.77% is the change from 649 to 339
Calculation steps:
[( 339 - 649 ) ÷ 649] x 100 = -47.77%
Formula
Percentage change = [(339 - 649) / 649] x 100
Subtract the new number by the original number
339 - 649 = -310
-310 ÷ 649 = -0.4776579352850539
-0.4776579352850539 x 100 = -47.77%