-32.66% is the change from 989 to 666
Calculation steps:
[( 666 - 989 ) ÷ 989] x 100 = -32.66%
Formula
Percentage change = [(666 - 989) / 989] x 100
Subtract the new number by the original number
666 - 989 = -323
-323 ÷ 989 = -0.32659251769464104
-0.32659251769464104 x 100 = -32.66%