-11.28% is the change from 257 to 228
Calculation steps:
[( 228 - 257 ) ÷ 257] x 100 = -11.28%
Formula
Percentage change = [(228 - 257) / 257] x 100
Subtract the new number by the original number
228 - 257 = -29
-29 ÷ 257 = -0.11284046692607004
-0.11284046692607004 x 100 = -11.28%