-79.17% is the change from 797 to 166
Calculation steps:
[( 166 - 797 ) ÷ 797] x 100 = -79.17%
Formula
Percentage change = [(166 - 797) / 797] x 100
Subtract the new number by the original number
166 - 797 = -631
-631 ÷ 797 = -0.7917189460476788
-0.7917189460476788 x 100 = -79.17%