1815% is the change from 20 to 383
Calculation steps:
[( 383 - 20 ) ÷ 20] x 100 = 1815%
Formula
Percentage change = [(383 - 20) / 20] x 100
Subtract the new number by the original number
383 - 20 = 363
363 ÷ 20 = 18.15
18.15 x 100 = 1815%
Example