-49.4% is the change from 996 to 504
Calculation steps:
[( 504 - 996 ) ÷ 996] x 100 = -49.4%
Formula
Percentage change = [(504 - 996) / 996] x 100
Subtract the new number by the original number
504 - 996 = -492
-492 ÷ 996 = -0.4939759036144578
-0.4939759036144578 x 100 = -49.4%