618.6% is the change from 43 to 309
Calculation steps:
[( 309 - 43 ) ÷ 43] x 100 = 618.6%
Formula
Percentage change = [(309 - 43) / 43] x 100
Subtract the new number by the original number
309 - 43 = 266
266 ÷ 43 = 6.186046511627907
6.186046511627907 x 100 = 618.6%