121.74% is the change from 230 to 510
Calculation steps:
[( 510 - 230 ) ÷ 230] x 100 = 121.74%
Formula
Percentage change = [(510 - 230) / 230] x 100
Subtract the new number by the original number
510 - 230 = 280
280 ÷ 230 = 1.2173913043478262
1.2173913043478262 x 100 = 121.74%