-1.25% is the change from 321 to 317
Calculation steps:
[( 317 - 321 ) ÷ 321] x 100 = -1.25%
Formula
Percentage change = [(317 - 321) / 321] x 100
Subtract the new number by the original number
317 - 321 = -4
-4 ÷ 321 = -0.012461059190031152
-0.012461059190031152 x 100 = -1.25%