-82.57% is the change from 987 to 172
Calculation steps:
[( 172 - 987 ) ÷ 987] x 100 = -82.57%
Formula
Percentage change = [(172 - 987) / 987] x 100
Subtract the new number by the original number
172 - 987 = -815
-815 ÷ 987 = -0.8257345491388045
-0.8257345491388045 x 100 = -82.57%