19.56% is the change from 685 to 819
Calculation steps:
[( 819 - 685 ) ÷ 685] x 100 = 19.56%
Formula
Percentage change = [(819 - 685) / 685] x 100
Subtract the new number by the original number
819 - 685 = 134
134 ÷ 685 = 0.19562043795620437
0.19562043795620437 x 100 = 19.56%