-52.02% is the change from 321 to 154
Calculation steps:
[( 154 - 321 ) ÷ 321] x 100 = -52.02%
Formula
Percentage change = [(154 - 321) / 321] x 100
Subtract the new number by the original number
154 - 321 = -167
-167 ÷ 321 = -0.5202492211838006
-0.5202492211838006 x 100 = -52.02%