52.75% is the change from 400 to 611
Calculation steps:
[( 611 - 400 ) ÷ 400] x 100 = 52.75%
Formula
Percentage change = [(611 - 400) / 400] x 100
Subtract the new number by the original number
611 - 400 = 211
211 ÷ 400 = 0.5275
0.5275 x 100 = 52.75%