-80.1% is the change from 829 to 165
Calculation steps:
[( 165 - 829 ) ÷ 829] x 100 = -80.1%
Formula
Percentage change = [(165 - 829) / 829] x 100
Subtract the new number by the original number
165 - 829 = -664
-664 ÷ 829 = -0.8009650180940893
-0.8009650180940893 x 100 = -80.1%