29.13% is the change from 515 to 665
Calculation steps:
[( 665 - 515 ) ÷ 515] x 100 = 29.13%
Formula
Percentage change = [(665 - 515) / 515] x 100
Subtract the new number by the original number
665 - 515 = 150
150 ÷ 515 = 0.2912621359223301
0.2912621359223301 x 100 = 29.13%