-55.86% is the change from 666 to 294
Calculation steps:
[( 294 - 666 ) ÷ 666] x 100 = -55.86%
Formula
Percentage change = [(294 - 666) / 666] x 100
Subtract the new number by the original number
294 - 666 = -372
-372 ÷ 666 = -0.5585585585585585
-0.5585585585585585 x 100 = -55.86%