250% is the change from 146 to 511
Calculation steps:
[( 511 - 146 ) ÷ 146] x 100 = 250%
Formula
Percentage change = [(511 - 146) / 146] x 100
Subtract the new number by the original number
511 - 146 = 365
365 ÷ 146 = 2.5
2.5 x 100 = 250%
Example