80.33% is the change from 427 to 770
Calculation steps:
[( 770 - 427 ) ÷ 427] x 100 = 80.33%
Formula
Percentage change = [(770 - 427) / 427] x 100
Subtract the new number by the original number
770 - 427 = 343
343 ÷ 427 = 0.8032786885245902
0.8032786885245902 x 100 = 80.33%