99.02% is the change from 307 to 611
Calculation steps:
[( 611 - 307 ) ÷ 307] x 100 = 99.02%
Formula
Percentage change = [(611 - 307) / 307] x 100
Subtract the new number by the original number
611 - 307 = 304
304 ÷ 307 = 0.990228013029316
0.990228013029316 x 100 = 99.02%