-62.1% is the change from 438 to 166
Calculation steps:
[( 166 - 438 ) ÷ 438] x 100 = -62.1%
Formula
Percentage change = [(166 - 438) / 438] x 100
Subtract the new number by the original number
166 - 438 = -272
-272 ÷ 438 = -0.6210045662100456
-0.6210045662100456 x 100 = -62.1%