-74.42% is the change from 997 to 255
Calculation steps:
[( 255 - 997 ) ÷ 997] x 100 = -74.42%
Formula
Percentage change = [(255 - 997) / 997] x 100
Subtract the new number by the original number
255 - 997 = -742
-742 ÷ 997 = -0.7442326980942828
-0.7442326980942828 x 100 = -74.42%