-72.27% is the change from 321 to 89
Calculation steps:
[( 89 - 321 ) ÷ 321] x 100 = -72.27%
Formula
Percentage change = [(89 - 321) / 321] x 100
Subtract the new number by the original number
89 - 321 = -232
-232 ÷ 321 = -0.7227414330218068
-0.7227414330218068 x 100 = -72.27%