-9.16% is the change from 251 to 228
Calculation steps:
[( 228 - 251 ) ÷ 251] x 100 = -9.16%
Formula
Percentage change = [(228 - 251) / 251] x 100
Subtract the new number by the original number
228 - 251 = -23
-23 ÷ 251 = -0.09163346613545817
-0.09163346613545817 x 100 = -9.16%