-75.33% is the change from 673 to 166
Calculation steps:
[( 166 - 673 ) ÷ 673] x 100 = -75.33%
Formula
Percentage change = [(166 - 673) / 673] x 100
Subtract the new number by the original number
166 - 673 = -507
-507 ÷ 673 = -0.7533432392273403
-0.7533432392273403 x 100 = -75.33%