-16.51% is the change from 321 to 268
Calculation steps:
[( 268 - 321 ) ÷ 321] x 100 = -16.51%
Formula
Percentage change = [(268 - 321) / 321] x 100
Subtract the new number by the original number
268 - 321 = -53
-53 ÷ 321 = -0.16510903426791276
-0.16510903426791276 x 100 = -16.51%