-49.75% is the change from 989 to 497
Calculation steps:
[( 497 - 989 ) ÷ 989] x 100 = -49.75%
Formula
Percentage change = [(497 - 989) / 989] x 100
Subtract the new number by the original number
497 - 989 = -492
-492 ÷ 989 = -0.4974721941354904
-0.4974721941354904 x 100 = -49.75%