-29.3% is the change from 942 to 666
Calculation steps:
[( 666 - 942 ) ÷ 942] x 100 = -29.3%
Formula
Percentage change = [(666 - 942) / 942] x 100
Subtract the new number by the original number
666 - 942 = -276
-276 ÷ 942 = -0.2929936305732484
-0.2929936305732484 x 100 = -29.3%