-30.3% is the change from 957 to 667
Calculation steps:
[( 667 - 957 ) ÷ 957] x 100 = -30.3%
Formula
Percentage change = [(667 - 957) / 957] x 100
Subtract the new number by the original number
667 - 957 = -290
-290 ÷ 957 = -0.30303030303030304
-0.30303030303030304 x 100 = -30.3%