20.96% is the change from 687 to 831
Calculation steps:
[( 831 - 687 ) ÷ 687] x 100 = 20.96%
Formula
Percentage change = [(831 - 687) / 687] x 100
Subtract the new number by the original number
831 - 687 = 144
144 ÷ 687 = 0.2096069868995633
0.2096069868995633 x 100 = 20.96%