-86.57% is the change from 134 to 18
Calculation steps:
[( 18 - 134 ) ÷ 134] x 100 = -86.57%
Formula
Percentage change = [(18 - 134) / 134] x 100
Subtract the new number by the original number
18 - 134 = -116
-116 ÷ 134 = -0.8656716417910447
-0.8656716417910447 x 100 = -86.57%