-85.07% is the change from 134 to 20
Calculation steps:
[( 20 - 134 ) ÷ 134] x 100 = -85.07%
Formula
Percentage change = [(20 - 134) / 134] x 100
Subtract the new number by the original number
20 - 134 = -114
-114 ÷ 134 = -0.8507462686567164
-0.8507462686567164 x 100 = -85.07%