4790% is the change from 20 to 978
Calculation steps:
[( 978 - 20 ) ÷ 20] x 100 = 4790%
Formula
Percentage change = [(978 - 20) / 20] x 100
Subtract the new number by the original number
978 - 20 = 958
958 ÷ 20 = 47.9
47.9 x 100 = 4790%
Example