65.58% is the change from 308 to 510
Calculation steps:
[( 510 - 308 ) ÷ 308] x 100 = 65.58%
Formula
Percentage change = [(510 - 308) / 308] x 100
Subtract the new number by the original number
510 - 308 = 202
202 ÷ 308 = 0.6558441558441559
0.6558441558441559 x 100 = 65.58%