-51.35% is the change from 37 to 18
Calculation steps:
[( 18 - 37 ) ÷ 37] x 100 = -51.35%
Formula
Percentage change = [(18 - 37) / 37] x 100
Subtract the new number by the original number
18 - 37 = -19
-19 ÷ 37 = -0.5135135135135135
-0.5135135135135135 x 100 = -51.35%