-52.63% is the change from 38 to 18
Calculation steps:
[( 18 - 38 ) ÷ 38] x 100 = -52.63%
Formula
Percentage change = [(18 - 38) / 38] x 100
Subtract the new number by the original number
18 - 38 = -20
-20 ÷ 38 = -0.5263157894736842
-0.5263157894736842 x 100 = -52.63%