77.02% is the change from 309 to 547
Calculation steps:
[( 547 - 309 ) ÷ 309] x 100 = 77.02%
Formula
Percentage change = [(547 - 309) / 309] x 100
Subtract the new number by the original number
547 - 309 = 238
238 ÷ 309 = 0.7702265372168284
0.7702265372168284 x 100 = 77.02%