29.67% is the change from 509 to 660
Calculation steps:
[( 660 - 509 ) ÷ 509] x 100 = 29.67%
Formula
Percentage change = [(660 - 509) / 509] x 100
Subtract the new number by the original number
660 - 509 = 151
151 ÷ 509 = 0.2966601178781925
0.2966601178781925 x 100 = 29.67%