-19.27% is the change from 825 to 666
Calculation steps:
[( 666 - 825 ) ÷ 825] x 100 = -19.27%
Formula
Percentage change = [(666 - 825) / 825] x 100
Subtract the new number by the original number
666 - 825 = -159
-159 ÷ 825 = -0.19272727272727272
-0.19272727272727272 x 100 = -19.27%