47.75% is the change from 400 to 591
Calculation steps:
[( 591 - 400 ) ÷ 400] x 100 = 47.75%
Formula
Percentage change = [(591 - 400) / 400] x 100
Subtract the new number by the original number
591 - 400 = 191
191 ÷ 400 = 0.4775
0.4775 x 100 = 47.75%