-32.59% is the change from 988 to 666
Calculation steps:
[( 666 - 988 ) ÷ 988] x 100 = -32.59%
Formula
Percentage change = [(666 - 988) / 988] x 100
Subtract the new number by the original number
666 - 988 = -322
-322 ÷ 988 = -0.3259109311740891
-0.3259109311740891 x 100 = -32.59%