-99.38% is the change from 321 to 2
Calculation steps:
[( 2 - 321 ) ÷ 321] x 100 = -99.38%
Formula
Percentage change = [(2 - 321) / 321] x 100
Subtract the new number by the original number
2 - 321 = -319
-319 ÷ 321 = -0.9937694704049844
-0.9937694704049844 x 100 = -99.38%