-68.22% is the change from 321 to 102
Calculation steps:
[( 102 - 321 ) ÷ 321] x 100 = -68.22%
Formula
Percentage change = [(102 - 321) / 321] x 100
Subtract the new number by the original number
102 - 321 = -219
-219 ÷ 321 = -0.6822429906542056
-0.6822429906542056 x 100 = -68.22%