-52.01% is the change from 646 to 310
Calculation steps:
[( 310 - 646 ) ÷ 646] x 100 = -52.01%
Formula
Percentage change = [(310 - 646) / 646] x 100
Subtract the new number by the original number
310 - 646 = -336
-336 ÷ 646 = -0.5201238390092879
-0.5201238390092879 x 100 = -52.01%