-48.8% is the change from 998 to 511
Calculation steps:
[( 511 - 998 ) ÷ 998] x 100 = -48.8%
Formula
Percentage change = [(511 - 998) / 998] x 100
Subtract the new number by the original number
511 - 998 = -487
-487 ÷ 998 = -0.4879759519038076
-0.4879759519038076 x 100 = -48.8%