18.82% is the change from 186 to 221
Calculation steps:
[( 221 - 186 ) ÷ 186] x 100 = 18.82%
Formula
Percentage change = [(221 - 186) / 186] x 100
Subtract the new number by the original number
221 - 186 = 35
35 ÷ 186 = 0.1881720430107527
0.1881720430107527 x 100 = 18.82%