67.11% is the change from 304 to 508
Calculation steps:
[( 508 - 304 ) ÷ 304] x 100 = 67.11%
Formula
Percentage change = [(508 - 304) / 304] x 100
Subtract the new number by the original number
508 - 304 = 204
204 ÷ 304 = 0.6710526315789473
0.6710526315789473 x 100 = 67.11%