-52.79% is the change from 646 to 305
Calculation steps:
[( 305 - 646 ) ÷ 646] x 100 = -52.79%
Formula
Percentage change = [(305 - 646) / 646] x 100
Subtract the new number by the original number
305 - 646 = -341
-341 ÷ 646 = -0.5278637770897833
-0.5278637770897833 x 100 = -52.79%