-46.79% is the change from 312 to 166
Calculation steps:
[( 166 - 312 ) ÷ 312] x 100 = -46.79%
Formula
Percentage change = [(166 - 312) / 312] x 100
Subtract the new number by the original number
166 - 312 = -146
-146 ÷ 312 = -0.46794871794871795
-0.46794871794871795 x 100 = -46.79%