-49.85% is the change from 993 to 498
Calculation steps:
[( 498 - 993 ) ÷ 993] x 100 = -49.85%
Formula
Percentage change = [(498 - 993) / 993] x 100
Subtract the new number by the original number
498 - 993 = -495
-495 ÷ 993 = -0.4984894259818731
-0.4984894259818731 x 100 = -49.85%