-85.4% is the change from 137 to 20
Calculation steps:
[( 20 - 137 ) ÷ 137] x 100 = -85.4%
Formula
Percentage change = [(20 - 137) / 137] x 100
Subtract the new number by the original number
20 - 137 = -117
-117 ÷ 137 = -0.8540145985401459
-0.8540145985401459 x 100 = -85.4%