-82.67% is the change from 987 to 171
Calculation steps:
[( 171 - 987 ) ÷ 987] x 100 = -82.67%
Formula
Percentage change = [(171 - 987) / 987] x 100
Subtract the new number by the original number
171 - 987 = -816
-816 ÷ 987 = -0.8267477203647416
-0.8267477203647416 x 100 = -82.67%