-71.51% is the change from 179 to 51
Calculation steps:
[( 51 - 179 ) ÷ 179] x 100 = -71.51%
Formula
Percentage change = [(51 - 179) / 179] x 100
Subtract the new number by the original number
51 - 179 = -128
-128 ÷ 179 = -0.7150837988826816
-0.7150837988826816 x 100 = -71.51%