68.42% is the change from 304 to 512
Calculation steps:
[( 512 - 304 ) ÷ 304] x 100 = 68.42%
Formula
Percentage change = [(512 - 304) / 304] x 100
Subtract the new number by the original number
512 - 304 = 208
208 ÷ 304 = 0.6842105263157895
0.6842105263157895 x 100 = 68.42%