68.86% is the change from 456 to 770
Calculation steps:
[( 770 - 456 ) ÷ 456] x 100 = 68.86%
Formula
Percentage change = [(770 - 456) / 456] x 100
Subtract the new number by the original number
770 - 456 = 314
314 ÷ 456 = 0.6885964912280702
0.6885964912280702 x 100 = 68.86%