-38.79% is the change from 825 to 505
Calculation steps:
[( 505 - 825 ) ÷ 825] x 100 = -38.79%
Formula
Percentage change = [(505 - 825) / 825] x 100
Subtract the new number by the original number
505 - 825 = -320
-320 ÷ 825 = -0.3878787878787879
-0.3878787878787879 x 100 = -38.79%