30.14% is the change from 511 to 665
Calculation steps:
[( 665 - 511 ) ÷ 511] x 100 = 30.14%
Formula
Percentage change = [(665 - 511) / 511] x 100
Subtract the new number by the original number
665 - 511 = 154
154 ÷ 511 = 0.3013698630136986
0.3013698630136986 x 100 = 30.14%