90.42% is the change from 428 to 815
Calculation steps:
[( 815 - 428 ) ÷ 428] x 100 = 90.42%
Formula
Percentage change = [(815 - 428) / 428] x 100
Subtract the new number by the original number
815 - 428 = 387
387 ÷ 428 = 0.9042056074766355
0.9042056074766355 x 100 = 90.42%