-77.13% is the change from 223 to 51
Calculation steps:
[( 51 - 223 ) ÷ 223] x 100 = -77.13%
Formula
Percentage change = [(51 - 223) / 223] x 100
Subtract the new number by the original number
51 - 223 = -172
-172 ÷ 223 = -0.7713004484304933
-0.7713004484304933 x 100 = -77.13%