-52.48% is the change from 646 to 307
Calculation steps:
[( 307 - 646 ) ÷ 646] x 100 = -52.48%
Formula
Percentage change = [(307 - 646) / 646] x 100
Subtract the new number by the original number
307 - 646 = -339
-339 ÷ 646 = -0.5247678018575851
-0.5247678018575851 x 100 = -52.48%