-18.18% is the change from 22 to 18
Calculation steps:
[( 18 - 22 ) ÷ 22] x 100 = -18.18%
Formula
Percentage change = [(18 - 22) / 22] x 100
Subtract the new number by the original number
18 - 22 = -4
-4 ÷ 22 = -0.18181818181818182
-0.18181818181818182 x 100 = -18.18%