-50.37% is the change from 671 to 333
Calculation steps:
[( 333 - 671 ) ÷ 671] x 100 = -50.37%
Formula
Percentage change = [(333 - 671) / 671] x 100
Subtract the new number by the original number
333 - 671 = -338
-338 ÷ 671 = -0.503725782414307
-0.503725782414307 x 100 = -50.37%