-48.94% is the change from 993 to 507
Calculation steps:
[( 507 - 993 ) ÷ 993] x 100 = -48.94%
Formula
Percentage change = [(507 - 993) / 993] x 100
Subtract the new number by the original number
507 - 993 = -486
-486 ÷ 993 = -0.48942598187311176
-0.48942598187311176 x 100 = -48.94%