-29.51% is the change from 942 to 664
Calculation steps:
[( 664 - 942 ) ÷ 942] x 100 = -29.51%
Formula
Percentage change = [(664 - 942) / 942] x 100
Subtract the new number by the original number
664 - 942 = -278
-278 ÷ 942 = -0.2951167728237792
-0.2951167728237792 x 100 = -29.51%