-37.93% is the change from 29 to 18
Calculation steps:
[( 18 - 29 ) ÷ 29] x 100 = -37.93%
Formula
Percentage change = [(18 - 29) / 29] x 100
Subtract the new number by the original number
18 - 29 = -11
-11 ÷ 29 = -0.3793103448275862
-0.3793103448275862 x 100 = -37.93%