-49.77% is the change from 657 to 330
Calculation steps:
[( 330 - 657 ) ÷ 657] x 100 = -49.77%
Formula
Percentage change = [(330 - 657) / 657] x 100
Subtract the new number by the original number
330 - 657 = -327
-327 ÷ 657 = -0.4977168949771689
-0.4977168949771689 x 100 = -49.77%