-6.58% is the change from 228 to 213
Calculation steps:
[( 213 - 228 ) ÷ 228] x 100 = -6.58%
Formula
Percentage change = [(213 - 228) / 228] x 100
Subtract the new number by the original number
213 - 228 = -15
-15 ÷ 228 = -0.06578947368421052
-0.06578947368421052 x 100 = -6.58%