78.5% is the change from 428 to 764
Calculation steps:
[( 764 - 428 ) ÷ 428] x 100 = 78.5%
Formula
Percentage change = [(764 - 428) / 428] x 100
Subtract the new number by the original number
764 - 428 = 336
336 ÷ 428 = 0.7850467289719626
0.7850467289719626 x 100 = 78.5%