-0.61% is the change from 825 to 820
Calculation steps:
[( 820 - 825 ) ÷ 825] x 100 = -0.61%
Formula
Percentage change = [(820 - 825) / 825] x 100
Subtract the new number by the original number
820 - 825 = -5
-5 ÷ 825 = -0.006060606060606061
-0.006060606060606061 x 100 = -0.61%