-53.58% is the change from 321 to 149
Calculation steps:
[( 149 - 321 ) ÷ 321] x 100 = -53.58%
Formula
Percentage change = [(149 - 321) / 321] x 100
Subtract the new number by the original number
149 - 321 = -172
-172 ÷ 321 = -0.5358255451713395
-0.5358255451713395 x 100 = -53.58%