-77.63% is the change from 228 to 51
Calculation steps:
[( 51 - 228 ) ÷ 228] x 100 = -77.63%
Formula
Percentage change = [(51 - 228) / 228] x 100
Subtract the new number by the original number
51 - 228 = -177
-177 ÷ 228 = -0.7763157894736842
-0.7763157894736842 x 100 = -77.63%