25450% is the change from 2 to 511
Calculation steps:
[( 511 - 2 ) ÷ 2] x 100 = 25450%
Formula
Percentage change = [(511 - 2) / 2] x 100
Subtract the new number by the original number
511 - 2 = 509
509 ÷ 2 = 254.5
254.5 x 100 = 25450%
Example