-1.01% is the change from 988 to 978
Calculation steps:
[( 978 - 988 ) ÷ 988] x 100 = -1.01%
Formula
Percentage change = [(978 - 988) / 988] x 100
Subtract the new number by the original number
978 - 988 = -10
-10 ÷ 988 = -0.010121457489878543
-0.010121457489878543 x 100 = -1.01%