21.23% is the change from 683 to 828
Calculation steps:
[( 828 - 683 ) ÷ 683] x 100 = 21.23%
Formula
Percentage change = [(828 - 683) / 683] x 100
Subtract the new number by the original number
828 - 683 = 145
145 ÷ 683 = 0.212298682284041
0.212298682284041 x 100 = 21.23%