100.8% is the change from 251 to 504
Calculation steps:
[( 504 - 251 ) ÷ 251] x 100 = 100.8%
Formula
Percentage change = [(504 - 251) / 251] x 100
Subtract the new number by the original number
504 - 251 = 253
253 ÷ 251 = 1.0079681274900398
1.0079681274900398 x 100 = 100.8%