1.23% is the change from 978 to 990
Calculation steps:
[( 990 - 978 ) ÷ 978] x 100 = 1.23%
Formula
Percentage change = [(990 - 978) / 978] x 100
Subtract the new number by the original number
990 - 978 = 12
12 ÷ 978 = 0.012269938650306749
0.012269938650306749 x 100 = 1.23%