121.21% is the change from 231 to 511
Calculation steps:
[( 511 - 231 ) ÷ 231] x 100 = 121.21%
Formula
Percentage change = [(511 - 231) / 231] x 100
Subtract the new number by the original number
511 - 231 = 280
280 ÷ 231 = 1.2121212121212122
1.2121212121212122 x 100 = 121.21%