-50.71% is the change from 992 to 489
Calculation steps:
[( 489 - 992 ) ÷ 992] x 100 = -50.71%
Formula
Percentage change = [(489 - 992) / 992] x 100
Subtract the new number by the original number
489 - 992 = -503
-503 ÷ 992 = -0.5070564516129032
-0.5070564516129032 x 100 = -50.71%