2600% is the change from 12 to 324
Calculation steps:
[( 324 - 12 ) ÷ 12] x 100 = 2600%
Formula
Percentage change = [(324 - 12) / 12] x 100
Subtract the new number by the original number
324 - 12 = 312
312 ÷ 12 = 26
26 x 100 = 2600%
Example