-79.65% is the change from 978 to 199
Calculation steps:
[( 199 - 978 ) ÷ 978] x 100 = -79.65%
Formula
Percentage change = [(199 - 978) / 978] x 100
Subtract the new number by the original number
199 - 978 = -779
-779 ÷ 978 = -0.7965235173824131
-0.7965235173824131 x 100 = -79.65%