1545% is the change from 20 to 329
Calculation steps:
[( 329 - 20 ) ÷ 20] x 100 = 1545%
Formula
Percentage change = [(329 - 20) / 20] x 100
Subtract the new number by the original number
329 - 20 = 309
309 ÷ 20 = 15.45
15.45 x 100 = 1545%
Example