1925% is the change from 20 to 405
Calculation steps:
[( 405 - 20 ) ÷ 20] x 100 = 1925%
Formula
Percentage change = [(405 - 20) / 20] x 100
Subtract the new number by the original number
405 - 20 = 385
385 ÷ 20 = 19.25
19.25 x 100 = 1925%
Example