-94.88% is the change from 997 to 51
Calculation steps:
[( 51 - 997 ) ÷ 997] x 100 = -94.88%
Formula
Percentage change = [(51 - 997) / 997] x 100
Subtract the new number by the original number
51 - 997 = -946
-946 ÷ 997 = -0.9488465396188566
-0.9488465396188566 x 100 = -94.88%