68% is the change from 400 to 672
Calculation steps:
[( 672 - 400 ) ÷ 400] x 100 = 68%
Formula
Percentage change = [(672 - 400) / 400] x 100
Subtract the new number by the original number
672 - 400 = 272
272 ÷ 400 = 0.68
0.68 x 100 = 68%
Example