-7.14% is the change from 14 to 13
Calculation steps:
[( 13 - 14 ) ÷ 14] x 100 = -7.14%
Formula
Percentage change = [(13 - 14) / 14] x 100
Subtract the new number by the original number
13 - 14 = -1
-1 ÷ 14 = -0.07142857142857142
-0.07142857142857142 x 100 = -7.14%