-88.7% is the change from 177 to 20
Calculation steps:
[( 20 - 177 ) ÷ 177] x 100 = -88.7%
Formula
Percentage change = [(20 - 177) / 177] x 100
Subtract the new number by the original number
20 - 177 = -157
-157 ÷ 177 = -0.8870056497175142
-0.8870056497175142 x 100 = -88.7%