68.89% is the change from 405 to 684
Calculation steps:
[( 684 - 405 ) ÷ 405] x 100 = 68.89%
Formula
Percentage change = [(684 - 405) / 405] x 100
Subtract the new number by the original number
684 - 405 = 279
279 ÷ 405 = 0.6888888888888889
0.6888888888888889 x 100 = 68.89%