-19.49% is the change from 826 to 665
Calculation steps:
[( 665 - 826 ) ÷ 826] x 100 = -19.49%
Formula
Percentage change = [(665 - 826) / 826] x 100
Subtract the new number by the original number
665 - 826 = -161
-161 ÷ 826 = -0.19491525423728814
-0.19491525423728814 x 100 = -19.49%