-12.58% is the change from 978 to 855
Calculation steps:
[( 855 - 978 ) ÷ 978] x 100 = -12.58%
Formula
Percentage change = [(855 - 978) / 978] x 100
Subtract the new number by the original number
855 - 978 = -123
-123 ÷ 978 = -0.12576687116564417
-0.12576687116564417 x 100 = -12.58%