-85.51% is the change from 138 to 20
Calculation steps:
[( 20 - 138 ) ÷ 138] x 100 = -85.51%
Formula
Percentage change = [(20 - 138) / 138] x 100
Subtract the new number by the original number
20 - 138 = -118
-118 ÷ 138 = -0.855072463768116
-0.855072463768116 x 100 = -85.51%