-52.47% is the change from 648 to 308
Calculation steps:
[( 308 - 648 ) ÷ 648] x 100 = -52.47%
Formula
Percentage change = [(308 - 648) / 648] x 100
Subtract the new number by the original number
308 - 648 = -340
-340 ÷ 648 = -0.5246913580246914
-0.5246913580246914 x 100 = -52.47%