-15.59% is the change from 186 to 157
Calculation steps:
[( 157 - 186 ) ÷ 186] x 100 = -15.59%
Formula
Percentage change = [(157 - 186) / 186] x 100
Subtract the new number by the original number
157 - 186 = -29
-29 ÷ 186 = -0.15591397849462366
-0.15591397849462366 x 100 = -15.59%