-0.2% is the change from 978 to 976
Calculation steps:
[( 976 - 978 ) ÷ 978] x 100 = -0.2%
Formula
Percentage change = [(976 - 978) / 978] x 100
Subtract the new number by the original number
976 - 978 = -2
-2 ÷ 978 = -0.002044989775051125
-0.002044989775051125 x 100 = -0.2%