18.98% is the change from 511 to 608
Calculation steps:
[( 608 - 511 ) ÷ 511] x 100 = 18.98%
Formula
Percentage change = [(608 - 511) / 511] x 100
Subtract the new number by the original number
608 - 511 = 97
97 ÷ 511 = 0.1898238747553816
0.1898238747553816 x 100 = 18.98%