5.24% is the change from 210 to 221
Calculation steps:
[( 221 - 210 ) ÷ 210] x 100 = 5.24%
Formula
Percentage change = [(221 - 210) / 210] x 100
Subtract the new number by the original number
221 - 210 = 11
11 ÷ 210 = 0.05238095238095238
0.05238095238095238 x 100 = 5.24%