-50.45% is the change from 660 to 327
Calculation steps:
[( 327 - 660 ) ÷ 660] x 100 = -50.45%
Formula
Percentage change = [(327 - 660) / 660] x 100
Subtract the new number by the original number
327 - 660 = -333
-333 ÷ 660 = -0.5045454545454545
-0.5045454545454545 x 100 = -50.45%