98.8% is the change from 251 to 499
Calculation steps:
[( 499 - 251 ) ÷ 251] x 100 = 98.8%
Formula
Percentage change = [(499 - 251) / 251] x 100
Subtract the new number by the original number
499 - 251 = 248
248 ÷ 251 = 0.9880478087649402
0.9880478087649402 x 100 = 98.8%