68.87% is the change from 302 to 510
Calculation steps:
[( 510 - 302 ) ÷ 302] x 100 = 68.87%
Formula
Percentage change = [(510 - 302) / 302] x 100
Subtract the new number by the original number
510 - 302 = 208
208 ÷ 302 = 0.6887417218543046
0.6887417218543046 x 100 = 68.87%