-47.3% is the change from 649 to 342
Calculation steps:
[( 342 - 649 ) ÷ 649] x 100 = -47.3%
Formula
Percentage change = [(342 - 649) / 649] x 100
Subtract the new number by the original number
342 - 649 = -307
-307 ÷ 649 = -0.47303543913713403
-0.47303543913713403 x 100 = -47.3%