7.28% is the change from 206 to 221
Calculation steps:
[( 221 - 206 ) ÷ 206] x 100 = 7.28%
Formula
Percentage change = [(221 - 206) / 206] x 100
Subtract the new number by the original number
221 - 206 = 15
15 ÷ 206 = 0.07281553398058252
0.07281553398058252 x 100 = 7.28%