2591.67% is the change from 12 to 323
Calculation steps:
[( 323 - 12 ) ÷ 12] x 100 = 2591.67%
Formula
Percentage change = [(323 - 12) / 12] x 100
Subtract the new number by the original number
323 - 12 = 311
311 ÷ 12 = 25.916666666666668
25.916666666666668 x 100 = 2591.67%