1855% is the change from 20 to 391
Calculation steps:
[( 391 - 20 ) ÷ 20] x 100 = 1855%
Formula
Percentage change = [(391 - 20) / 20] x 100
Subtract the new number by the original number
391 - 20 = 371
371 ÷ 20 = 18.55
18.55 x 100 = 1855%
Example