-51.1% is the change from 998 to 488
Calculation steps:
[( 488 - 998 ) ÷ 998] x 100 = -51.1%
Formula
Percentage change = [(488 - 998) / 998] x 100
Subtract the new number by the original number
488 - 998 = -510
-510 ÷ 998 = -0.5110220440881763
-0.5110220440881763 x 100 = -51.1%