-50% is the change from 228 to 114
Calculation steps:
[( 114 - 228 ) ÷ 228] x 100 = -50%
Formula
Percentage change = [(114 - 228) / 228] x 100
Subtract the new number by the original number
114 - 228 = -114
-114 ÷ 228 = -0.5
-0.5 x 100 = -50%
Example