-74.32% is the change from 997 to 256
Calculation steps:
[( 256 - 997 ) ÷ 997] x 100 = -74.32%
Formula
Percentage change = [(256 - 997) / 997] x 100
Subtract the new number by the original number
256 - 997 = -741
-741 ÷ 997 = -0.7432296890672017
-0.7432296890672017 x 100 = -74.32%