30.12% is the change from 249 to 324
Calculation steps:
[( 324 - 249 ) ÷ 249] x 100 = 30.12%
Formula
Percentage change = [(324 - 249) / 249] x 100
Subtract the new number by the original number
324 - 249 = 75
75 ÷ 249 = 0.30120481927710846
0.30120481927710846 x 100 = 30.12%