197.09% is the change from 309 to 918
Calculation steps:
[( 918 - 309 ) ÷ 309] x 100 = 197.09%
Formula
Percentage change = [(918 - 309) / 309] x 100
Subtract the new number by the original number
918 - 309 = 609
609 ÷ 309 = 1.970873786407767
1.970873786407767 x 100 = 197.09%