72.75% is the change from 400 to 691
Calculation steps:
[( 691 - 400 ) ÷ 400] x 100 = 72.75%
Formula
Percentage change = [(691 - 400) / 400] x 100
Subtract the new number by the original number
691 - 400 = 291
291 ÷ 400 = 0.7275
0.7275 x 100 = 72.75%