-86.61% is the change from 978 to 131
Calculation steps:
[( 131 - 978 ) ÷ 978] x 100 = -86.61%
Formula
Percentage change = [(131 - 978) / 978] x 100
Subtract the new number by the original number
131 - 978 = -847
-847 ÷ 978 = -0.8660531697341514
-0.8660531697341514 x 100 = -86.61%