780.39% is the change from 51 to 449
Calculation steps:
[( 449 - 51 ) ÷ 51] x 100 = 780.39%
Formula
Percentage change = [(449 - 51) / 51] x 100
Subtract the new number by the original number
449 - 51 = 398
398 ÷ 51 = 7.803921568627451
7.803921568627451 x 100 = 780.39%