-31.58% is the change from 228 to 156
Calculation steps:
[( 156 - 228 ) ÷ 228] x 100 = -31.58%
Formula
Percentage change = [(156 - 228) / 228] x 100
Subtract the new number by the original number
156 - 228 = -72
-72 ÷ 228 = -0.3157894736842105
-0.3157894736842105 x 100 = -31.58%