20.71% is the change from 478 to 577
Calculation steps:
[( 577 - 478 ) ÷ 478] x 100 = 20.71%
Formula
Percentage change = [(577 - 478) / 478] x 100
Subtract the new number by the original number
577 - 478 = 99
99 ÷ 478 = 0.20711297071129708
0.20711297071129708 x 100 = 20.71%