62.42% is the change from 306 to 497
Calculation steps:
[( 497 - 306 ) ÷ 306] x 100 = 62.42%
Formula
Percentage change = [(497 - 306) / 306] x 100
Subtract the new number by the original number
497 - 306 = 191
191 ÷ 306 = 0.6241830065359477
0.6241830065359477 x 100 = 62.42%