34.21% is the change from 304 to 408
Calculation steps:
[( 408 - 304 ) ÷ 304] x 100 = 34.21%
Formula
Percentage change = [(408 - 304) / 304] x 100
Subtract the new number by the original number
408 - 304 = 104
104 ÷ 304 = 0.34210526315789475
0.34210526315789475 x 100 = 34.21%