149.51% is the change from 204 to 509
Calculation steps:
[( 509 - 204 ) ÷ 204] x 100 = 149.51%
Formula
Percentage change = [(509 - 204) / 204] x 100
Subtract the new number by the original number
509 - 204 = 305
305 ÷ 204 = 1.4950980392156863
1.4950980392156863 x 100 = 149.51%