-56.44% is the change from 668 to 291
Calculation steps:
[( 291 - 668 ) ÷ 668] x 100 = -56.44%
Formula
Percentage change = [(291 - 668) / 668] x 100
Subtract the new number by the original number
291 - 668 = -377
-377 ÷ 668 = -0.5643712574850299
-0.5643712574850299 x 100 = -56.44%