-74.37% is the change from 199 to 51
Calculation steps:
[( 51 - 199 ) ÷ 199] x 100 = -74.37%
Formula
Percentage change = [(51 - 199) / 199] x 100
Subtract the new number by the original number
51 - 199 = -148
-148 ÷ 199 = -0.7437185929648241
-0.7437185929648241 x 100 = -74.37%