-15.84% is the change from 221 to 186
Calculation steps:
[( 186 - 221 ) ÷ 221] x 100 = -15.84%
Formula
Percentage change = [(186 - 221) / 221] x 100
Subtract the new number by the original number
186 - 221 = -35
-35 ÷ 221 = -0.1583710407239819
-0.1583710407239819 x 100 = -15.84%