-26.69% is the change from 311 to 228
Calculation steps:
[( 228 - 311 ) ÷ 311] x 100 = -26.69%
Formula
Percentage change = [(228 - 311) / 311] x 100
Subtract the new number by the original number
228 - 311 = -83
-83 ÷ 311 = -0.26688102893890675
-0.26688102893890675 x 100 = -26.69%