-5.29% is the change from 227 to 215
Calculation steps:
[( 215 - 227 ) ÷ 227] x 100 = -5.29%
Formula
Percentage change = [(215 - 227) / 227] x 100
Subtract the new number by the original number
215 - 227 = -12
-12 ÷ 227 = -0.05286343612334802
-0.05286343612334802 x 100 = -5.29%