-50.52% is the change from 671 to 332
Calculation steps:
[( 332 - 671 ) ÷ 671] x 100 = -50.52%
Formula
Percentage change = [(332 - 671) / 671] x 100
Subtract the new number by the original number
332 - 671 = -339
-339 ÷ 671 = -0.5052160953800298
-0.5052160953800298 x 100 = -50.52%