-78.8% is the change from 783 to 166
Calculation steps:
[( 166 - 783 ) ÷ 783] x 100 = -78.8%
Formula
Percentage change = [(166 - 783) / 783] x 100
Subtract the new number by the original number
166 - 783 = -617
-617 ÷ 783 = -0.7879948914431673
-0.7879948914431673 x 100 = -78.8%