4400% is the change from 20 to 900
Calculation steps:
[( 900 - 20 ) ÷ 20] x 100 = 4400%
Formula
Percentage change = [(900 - 20) / 20] x 100
Subtract the new number by the original number
900 - 20 = 880
880 ÷ 20 = 44
44 x 100 = 4400%
Example