-71.92% is the change from 997 to 280
Calculation steps:
[( 280 - 997 ) ÷ 997] x 100 = -71.92%
Formula
Percentage change = [(280 - 997) / 997] x 100
Subtract the new number by the original number
280 - 997 = -717
-717 ÷ 997 = -0.7191574724172518
-0.7191574724172518 x 100 = -71.92%