22.63% is the change from 685 to 840
Calculation steps:
[( 840 - 685 ) ÷ 685] x 100 = 22.63%
Formula
Percentage change = [(840 - 685) / 685] x 100
Subtract the new number by the original number
840 - 685 = 155
155 ÷ 685 = 0.22627737226277372
0.22627737226277372 x 100 = 22.63%