-90.3% is the change from 825 to 80
Calculation steps:
[( 80 - 825 ) ÷ 825] x 100 = -90.3%
Formula
Percentage change = [(80 - 825) / 825] x 100
Subtract the new number by the original number
80 - 825 = -745
-745 ÷ 825 = -0.9030303030303031
-0.9030303030303031 x 100 = -90.3%