39.86% is the change from 587 to 821
Calculation steps:
[( 821 - 587 ) ÷ 587] x 100 = 39.86%
Formula
Percentage change = [(821 - 587) / 587] x 100
Subtract the new number by the original number
821 - 587 = 234
234 ÷ 587 = 0.3986371379897785
0.3986371379897785 x 100 = 39.86%