26.61% is the change from 511 to 647
Calculation steps:
[( 647 - 511 ) ÷ 511] x 100 = 26.61%
Formula
Percentage change = [(647 - 511) / 511] x 100
Subtract the new number by the original number
647 - 511 = 136
136 ÷ 511 = 0.26614481409001955
0.26614481409001955 x 100 = 26.61%