-94.39% is the change from 909 to 51
Calculation steps:
[( 51 - 909 ) ÷ 909] x 100 = -94.39%
Formula
Percentage change = [(51 - 909) / 909] x 100
Subtract the new number by the original number
51 - 909 = -858
-858 ÷ 909 = -0.9438943894389439
-0.9438943894389439 x 100 = -94.39%