-52.7% is the change from 649 to 307
Calculation steps:
[( 307 - 649 ) ÷ 649] x 100 = -52.7%
Formula
Percentage change = [(307 - 649) / 649] x 100
Subtract the new number by the original number
307 - 649 = -342
-342 ÷ 649 = -0.5269645608628659
-0.5269645608628659 x 100 = -52.7%