78.88% is the change from 251 to 449
Calculation steps:
[( 449 - 251 ) ÷ 251] x 100 = 78.88%
Formula
Percentage change = [(449 - 251) / 251] x 100
Subtract the new number by the original number
449 - 251 = 198
198 ÷ 251 = 0.7888446215139442
0.7888446215139442 x 100 = 78.88%