0.49% is the change from 821 to 825
Calculation steps:
[( 825 - 821 ) ÷ 821] x 100 = 0.49%
Formula
Percentage change = [(825 - 821) / 821] x 100
Subtract the new number by the original number
825 - 821 = 4
4 ÷ 821 = 0.0048721071863581
0.0048721071863581 x 100 = 0.49%