100% is the change from 489 to 978
Calculation steps:
[( 978 - 489 ) ÷ 489] x 100 = 100%
Formula
Percentage change = [(978 - 489) / 489] x 100
Subtract the new number by the original number
978 - 489 = 489
489 ÷ 489 = 1
1 x 100 = 100%
Example