68.79% is the change from 455 to 768
Calculation steps:
[( 768 - 455 ) ÷ 455] x 100 = 68.79%
Formula
Percentage change = [(768 - 455) / 455] x 100
Subtract the new number by the original number
768 - 455 = 313
313 ÷ 455 = 0.6879120879120879
0.6879120879120879 x 100 = 68.79%