49.45% is the change from 455 to 680
Calculation steps:
[( 680 - 455 ) ÷ 455] x 100 = 49.45%
Formula
Percentage change = [(680 - 455) / 455] x 100
Subtract the new number by the original number
680 - 455 = 225
225 ÷ 455 = 0.4945054945054945
0.4945054945054945 x 100 = 49.45%