-47.61% is the change from 649 to 340
Calculation steps:
[( 340 - 649 ) ÷ 649] x 100 = -47.61%
Formula
Percentage change = [(340 - 649) / 649] x 100
Subtract the new number by the original number
340 - 649 = -309
-309 ÷ 649 = -0.4761171032357473
-0.4761171032357473 x 100 = -47.61%