-1.78% is the change from 225 to 221
Calculation steps:
[( 221 - 225 ) ÷ 225] x 100 = -1.78%
Formula
Percentage change = [(221 - 225) / 225] x 100
Subtract the new number by the original number
221 - 225 = -4
-4 ÷ 225 = -0.017777777777777778
-0.017777777777777778 x 100 = -1.78%