-76.3% is the change from 671 to 159
Calculation steps:
[( 159 - 671 ) ÷ 671] x 100 = -76.3%
Formula
Percentage change = [(159 - 671) / 671] x 100
Subtract the new number by the original number
159 - 671 = -512
-512 ÷ 671 = -0.7630402384500745
-0.7630402384500745 x 100 = -76.3%