74.76% is the change from 309 to 540
Calculation steps:
[( 540 - 309 ) ÷ 309] x 100 = 74.76%
Formula
Percentage change = [(540 - 309) / 309] x 100
Subtract the new number by the original number
540 - 309 = 231
231 ÷ 309 = 0.7475728155339806
0.7475728155339806 x 100 = 74.76%