-12.15% is the change from 321 to 282
Calculation steps:
[( 282 - 321 ) ÷ 321] x 100 = -12.15%
Formula
Percentage change = [(282 - 321) / 321] x 100
Subtract the new number by the original number
282 - 321 = -39
-39 ÷ 321 = -0.12149532710280374
-0.12149532710280374 x 100 = -12.15%