-11.24% is the change from 178 to 158
Calculation steps:
[( 158 - 178 ) ÷ 178] x 100 = -11.24%
Formula
Percentage change = [(158 - 178) / 178] x 100
Subtract the new number by the original number
158 - 178 = -20
-20 ÷ 178 = -0.11235955056179775
-0.11235955056179775 x 100 = -11.24%