-76.45% is the change from 671 to 158
Calculation steps:
[( 158 - 671 ) ÷ 671] x 100 = -76.45%
Formula
Percentage change = [(158 - 671) / 671] x 100
Subtract the new number by the original number
158 - 671 = -513
-513 ÷ 671 = -0.7645305514157973
-0.7645305514157973 x 100 = -76.45%