-78.66% is the change from 778 to 166
Calculation steps:
[( 166 - 778 ) ÷ 778] x 100 = -78.66%
Formula
Percentage change = [(166 - 778) / 778] x 100
Subtract the new number by the original number
166 - 778 = -612
-612 ÷ 778 = -0.7866323907455013
-0.7866323907455013 x 100 = -78.66%