209.7% is the change from 165 to 511
Calculation steps:
[( 511 - 165 ) ÷ 165] x 100 = 209.7%
Formula
Percentage change = [(511 - 165) / 165] x 100
Subtract the new number by the original number
511 - 165 = 346
346 ÷ 165 = 2.096969696969697
2.096969696969697 x 100 = 209.7%