-28.62% is the change from 318 to 227
Calculation steps:
[( 227 - 318 ) ÷ 318] x 100 = -28.62%
Formula
Percentage change = [(227 - 318) / 318] x 100
Subtract the new number by the original number
227 - 318 = -91
-91 ÷ 318 = -0.2861635220125786
-0.2861635220125786 x 100 = -28.62%