96.44% is the change from 309 to 607
Calculation steps:
[( 607 - 309 ) ÷ 309] x 100 = 96.44%
Formula
Percentage change = [(607 - 309) / 309] x 100
Subtract the new number by the original number
607 - 309 = 298
298 ÷ 309 = 0.9644012944983819
0.9644012944983819 x 100 = 96.44%