1500% is the change from 1 to 16
Calculation steps:
[( 16 - 1 ) ÷ 1] x 100 = 1500%
Formula
Percentage change = [(16 - 1) / 1] x 100
Subtract the new number by the original number
16 - 1 = 15
15 ÷ 1 = 15
15 x 100 = 1500%
Example