-7.69% is the change from 247 to 228
Calculation steps:
[( 228 - 247 ) ÷ 247] x 100 = -7.69%
Formula
Percentage change = [(228 - 247) / 247] x 100
Subtract the new number by the original number
228 - 247 = -19
-19 ÷ 247 = -0.07692307692307693
-0.07692307692307693 x 100 = -7.69%