-61.05% is the change from 421 to 164
Calculation steps:
[( 164 - 421 ) ÷ 421] x 100 = -61.05%
Formula
Percentage change = [(164 - 421) / 421] x 100
Subtract the new number by the original number
164 - 421 = -257
-257 ÷ 421 = -0.6104513064133017
-0.6104513064133017 x 100 = -61.05%