-81.6% is the change from 978 to 180
Calculation steps:
[( 180 - 978 ) ÷ 978] x 100 = -81.6%
Formula
Percentage change = [(180 - 978) / 978] x 100
Subtract the new number by the original number
180 - 978 = -798
-798 ÷ 978 = -0.8159509202453987
-0.8159509202453987 x 100 = -81.6%