-17.67% is the change from 996 to 820
Calculation steps:
[( 820 - 996 ) ÷ 996] x 100 = -17.67%
Formula
Percentage change = [(820 - 996) / 996] x 100
Subtract the new number by the original number
820 - 996 = -176
-176 ÷ 996 = -0.17670682730923695
-0.17670682730923695 x 100 = -17.67%