-85.89% is the change from 978 to 138
Calculation steps:
[( 138 - 978 ) ÷ 978] x 100 = -85.89%
Formula
Percentage change = [(138 - 978) / 978] x 100
Subtract the new number by the original number
138 - 978 = -840
-840 ÷ 978 = -0.8588957055214724
-0.8588957055214724 x 100 = -85.89%