248.63% is the change from 146 to 509
Calculation steps:
[( 509 - 146 ) ÷ 146] x 100 = 248.63%
Formula
Percentage change = [(509 - 146) / 146] x 100
Subtract the new number by the original number
509 - 146 = 363
363 ÷ 146 = 2.4863013698630136
2.4863013698630136 x 100 = 248.63%