1936% is the change from 25 to 509
Calculation steps:
[( 509 - 25 ) ÷ 25] x 100 = 1936%
Formula
Percentage change = [(509 - 25) / 25] x 100
Subtract the new number by the original number
509 - 25 = 484
484 ÷ 25 = 19.36
19.36 x 100 = 1936%
Example