1660% is the change from 20 to 352
Calculation steps:
[( 352 - 20 ) ÷ 20] x 100 = 1660%
Formula
Percentage change = [(352 - 20) / 20] x 100
Subtract the new number by the original number
352 - 20 = 332
332 ÷ 20 = 16.6
16.6 x 100 = 1660%
Example