29.2% is the change from 250 to 323
Calculation steps:
[( 323 - 250 ) ÷ 250] x 100 = 29.2%
Formula
Percentage change = [(323 - 250) / 250] x 100
Subtract the new number by the original number
323 - 250 = 73
73 ÷ 250 = 0.292
0.292 x 100 = 29.2%
Example