-33.13% is the change from 996 to 666
Calculation steps:
[( 666 - 996 ) ÷ 996] x 100 = -33.13%
Formula
Percentage change = [(666 - 996) / 996] x 100
Subtract the new number by the original number
666 - 996 = -330
-330 ÷ 996 = -0.3313253012048193
-0.3313253012048193 x 100 = -33.13%