20.82% is the change from 687 to 830
Calculation steps:
[( 830 - 687 ) ÷ 687] x 100 = 20.82%
Formula
Percentage change = [(830 - 687) / 687] x 100
Subtract the new number by the original number
830 - 687 = 143
143 ÷ 687 = 0.2081513828238719
0.2081513828238719 x 100 = 20.82%