-83.08% is the change from 981 to 166
Calculation steps:
[( 166 - 981 ) ÷ 981] x 100 = -83.08%
Formula
Percentage change = [(166 - 981) / 981] x 100
Subtract the new number by the original number
166 - 981 = -815
-815 ÷ 981 = -0.8307849133537207
-0.8307849133537207 x 100 = -83.08%