-6.25% is the change from 16 to 15
Calculation steps:
[( 15 - 16 ) ÷ 16] x 100 = -6.25%
Formula
Percentage change = [(15 - 16) / 16] x 100
Subtract the new number by the original number
15 - 16 = -1
-1 ÷ 16 = -0.0625
-0.0625 x 100 = -6.25%
Example