19.25% is the change from 400 to 477
Calculation steps:
[( 477 - 400 ) ÷ 400] x 100 = 19.25%
Formula
Percentage change = [(477 - 400) / 400] x 100
Subtract the new number by the original number
477 - 400 = 77
77 ÷ 400 = 0.1925
0.1925 x 100 = 19.25%
Example