50.78% is the change from 451 to 680
Calculation steps:
[( 680 - 451 ) ÷ 451] x 100 = 50.78%
Formula
Percentage change = [(680 - 451) / 451] x 100
Subtract the new number by the original number
680 - 451 = 229
229 ÷ 451 = 0.5077605321507761
0.5077605321507761 x 100 = 50.78%