-88.14% is the change from 177 to 21
Calculation steps:
[( 21 - 177 ) ÷ 177] x 100 = -88.14%
Formula
Percentage change = [(21 - 177) / 177] x 100
Subtract the new number by the original number
21 - 177 = -156
-156 ÷ 177 = -0.8813559322033898
-0.8813559322033898 x 100 = -88.14%