1.25% is the change from 321 to 325
Calculation steps:
[( 325 - 321 ) ÷ 321] x 100 = 1.25%
Formula
Percentage change = [(325 - 321) / 321] x 100
Subtract the new number by the original number
325 - 321 = 4
4 ÷ 321 = 0.012461059190031152
0.012461059190031152 x 100 = 1.25%