100% is the change from 252 to 504
Calculation steps:
[( 504 - 252 ) ÷ 252] x 100 = 100%
Formula
Percentage change = [(504 - 252) / 252] x 100
Subtract the new number by the original number
504 - 252 = 252
252 ÷ 252 = 1
1 x 100 = 100%
Example