18.98% is the change from 685 to 815
Calculation steps:
[( 815 - 685 ) ÷ 685] x 100 = 18.98%
Formula
Percentage change = [(815 - 685) / 685] x 100
Subtract the new number by the original number
815 - 685 = 130
130 ÷ 685 = 0.1897810218978102
0.1897810218978102 x 100 = 18.98%