10.5% is the change from 200 to 221
Calculation steps:
[( 221 - 200 ) ÷ 200] x 100 = 10.5%
Formula
Percentage change = [(221 - 200) / 200] x 100
Subtract the new number by the original number
221 - 200 = 21
21 ÷ 200 = 0.105
0.105 x 100 = 10.5%
Example