-82.66% is the change from 986 to 171
Calculation steps:
[( 171 - 986 ) ÷ 986] x 100 = -82.66%
Formula
Percentage change = [(171 - 986) / 986] x 100
Subtract the new number by the original number
171 - 986 = -815
-815 ÷ 986 = -0.8265720081135902
-0.8265720081135902 x 100 = -82.66%