-49.69% is the change from 648 to 326
Calculation steps:
[( 326 - 648 ) ÷ 648] x 100 = -49.69%
Formula
Percentage change = [(326 - 648) / 648] x 100
Subtract the new number by the original number
326 - 648 = -322
-322 ÷ 648 = -0.49691358024691357
-0.49691358024691357 x 100 = -49.69%