-50.08% is the change from 657 to 328
Calculation steps:
[( 328 - 657 ) ÷ 657] x 100 = -50.08%
Formula
Percentage change = [(328 - 657) / 657] x 100
Subtract the new number by the original number
328 - 657 = -329
-329 ÷ 657 = -0.5007610350076104
-0.5007610350076104 x 100 = -50.08%