1500% is the change from 16 to 256
Calculation steps:
[( 256 - 16 ) ÷ 16] x 100 = 1500%
Formula
Percentage change = [(256 - 16) / 16] x 100
Subtract the new number by the original number
256 - 16 = 240
240 ÷ 16 = 15
15 x 100 = 1500%
Example