-51.27% is the change from 669 to 326
Calculation steps:
[( 326 - 669 ) ÷ 669] x 100 = -51.27%
Formula
Percentage change = [(326 - 669) / 669] x 100
Subtract the new number by the original number
326 - 669 = -343
-343 ÷ 669 = -0.5127055306427504
-0.5127055306427504 x 100 = -51.27%