-45.15% is the change from 999 to 548
Calculation steps:
[( 548 - 999 ) ÷ 999] x 100 = -45.15%
Formula
Percentage change = [(548 - 999) / 999] x 100
Subtract the new number by the original number
548 - 999 = -451
-451 ÷ 999 = -0.45145145145145144
-0.45145145145145144 x 100 = -45.15%