-21.45% is the change from 825 to 648
Calculation steps:
[( 648 - 825 ) ÷ 825] x 100 = -21.45%
Formula
Percentage change = [(648 - 825) / 825] x 100
Subtract the new number by the original number
648 - 825 = -177
-177 ÷ 825 = -0.21454545454545454
-0.21454545454545454 x 100 = -21.45%