-53% is the change from 666 to 313
Calculation steps:
[( 313 - 666 ) ÷ 666] x 100 = -53%
Formula
Percentage change = [(313 - 666) / 666] x 100
Subtract the new number by the original number
313 - 666 = -353
-353 ÷ 666 = -0.53003003003003
-0.53003003003003 x 100 = -53%