-79.9% is the change from 826 to 166
Calculation steps:
[( 166 - 826 ) ÷ 826] x 100 = -79.9%
Formula
Percentage change = [(166 - 826) / 826] x 100
Subtract the new number by the original number
166 - 826 = -660
-660 ÷ 826 = -0.7990314769975787
-0.7990314769975787 x 100 = -79.9%