-74.19% is the change from 988 to 255
Calculation steps:
[( 255 - 988 ) ÷ 988] x 100 = -74.19%
Formula
Percentage change = [(255 - 988) / 988] x 100
Subtract the new number by the original number
255 - 988 = -733
-733 ÷ 988 = -0.7419028340080972
-0.7419028340080972 x 100 = -74.19%