1.81% is the change from 221 to 225
Calculation steps:
[( 225 - 221 ) ÷ 221] x 100 = 1.81%
Formula
Percentage change = [(225 - 221) / 221] x 100
Subtract the new number by the original number
225 - 221 = 4
4 ÷ 221 = 0.01809954751131222
0.01809954751131222 x 100 = 1.81%