69.75% is the change from 400 to 679
Calculation steps:
[( 679 - 400 ) ÷ 400] x 100 = 69.75%
Formula
Percentage change = [(679 - 400) / 400] x 100
Subtract the new number by the original number
679 - 400 = 279
279 ÷ 400 = 0.6975
0.6975 x 100 = 69.75%