-50.6% is the change from 998 to 493
Calculation steps:
[( 493 - 998 ) ÷ 998] x 100 = -50.6%
Formula
Percentage change = [(493 - 998) / 998] x 100
Subtract the new number by the original number
493 - 998 = -505
-505 ÷ 998 = -0.5060120240480962
-0.5060120240480962 x 100 = -50.6%