-21.93% is the change from 228 to 178
Calculation steps:
[( 178 - 228 ) ÷ 228] x 100 = -21.93%
Formula
Percentage change = [(178 - 228) / 228] x 100
Subtract the new number by the original number
178 - 228 = -50
-50 ÷ 228 = -0.21929824561403508
-0.21929824561403508 x 100 = -21.93%