1900% is the change from 16 to 320
Calculation steps:
[( 320 - 16 ) ÷ 16] x 100 = 1900%
Formula
Percentage change = [(320 - 16) / 16] x 100
Subtract the new number by the original number
320 - 16 = 304
304 ÷ 16 = 19
19 x 100 = 1900%
Example