-32.52% is the change from 987 to 666
Calculation steps:
[( 666 - 987 ) ÷ 987] x 100 = -32.52%
Formula
Percentage change = [(666 - 987) / 987] x 100
Subtract the new number by the original number
666 - 987 = -321
-321 ÷ 987 = -0.3252279635258359
-0.3252279635258359 x 100 = -32.52%