24.5% is the change from 249 to 310
Calculation steps:
[( 310 - 249 ) ÷ 249] x 100 = 24.5%
Formula
Percentage change = [(310 - 249) / 249] x 100
Subtract the new number by the original number
310 - 249 = 61
61 ÷ 249 = 0.24497991967871485
0.24497991967871485 x 100 = 24.5%