-21.18% is the change from 288 to 227
Calculation steps:
[( 227 - 288 ) ÷ 288] x 100 = -21.18%
Formula
Percentage change = [(227 - 288) / 288] x 100
Subtract the new number by the original number
227 - 288 = -61
-61 ÷ 288 = -0.21180555555555555
-0.21180555555555555 x 100 = -21.18%