68.49% is the change from 457 to 770
Calculation steps:
[( 770 - 457 ) ÷ 457] x 100 = 68.49%
Formula
Percentage change = [(770 - 457) / 457] x 100
Subtract the new number by the original number
770 - 457 = 313
313 ÷ 457 = 0.6849015317286652
0.6849015317286652 x 100 = 68.49%