-51.96% is the change from 997 to 479
Calculation steps:
[( 479 - 997 ) ÷ 997] x 100 = -51.96%
Formula
Percentage change = [(479 - 997) / 997] x 100
Subtract the new number by the original number
479 - 997 = -518
-518 ÷ 997 = -0.5195586760280843
-0.5195586760280843 x 100 = -51.96%