19.51% is the change from 687 to 821
Calculation steps:
[( 821 - 687 ) ÷ 687] x 100 = 19.51%
Formula
Percentage change = [(821 - 687) / 687] x 100
Subtract the new number by the original number
821 - 687 = 134
134 ÷ 687 = 0.1950509461426492
0.1950509461426492 x 100 = 19.51%