-64.38% is the change from 671 to 239
Calculation steps:
[( 239 - 671 ) ÷ 671] x 100 = -64.38%
Formula
Percentage change = [(239 - 671) / 671] x 100
Subtract the new number by the original number
239 - 671 = -432
-432 ÷ 671 = -0.6438152011922503
-0.6438152011922503 x 100 = -64.38%