-97.45% is the change from 825 to 21
Calculation steps:
[( 21 - 825 ) ÷ 825] x 100 = -97.45%
Formula
Percentage change = [(21 - 825) / 825] x 100
Subtract the new number by the original number
21 - 825 = -804
-804 ÷ 825 = -0.9745454545454545
-0.9745454545454545 x 100 = -97.45%