-15.93% is the change from 270 to 227
Calculation steps:
[( 227 - 270 ) ÷ 270] x 100 = -15.93%
Formula
Percentage change = [(227 - 270) / 270] x 100
Subtract the new number by the original number
227 - 270 = -43
-43 ÷ 270 = -0.15925925925925927
-0.15925925925925927 x 100 = -15.93%