-74.38% is the change from 648 to 166
Calculation steps:
[( 166 - 648 ) ÷ 648] x 100 = -74.38%
Formula
Percentage change = [(166 - 648) / 648] x 100
Subtract the new number by the original number
166 - 648 = -482
-482 ÷ 648 = -0.7438271604938271
-0.7438271604938271 x 100 = -74.38%