48.6% is the change from 321 to 477
Calculation steps:
[( 477 - 321 ) ÷ 321] x 100 = 48.6%
Formula
Percentage change = [(477 - 321) / 321] x 100
Subtract the new number by the original number
477 - 321 = 156
156 ÷ 321 = 0.48598130841121495
0.48598130841121495 x 100 = 48.6%