-30.34% is the change from 959 to 668
Calculation steps:
[( 668 - 959 ) ÷ 959] x 100 = -30.34%
Formula
Percentage change = [(668 - 959) / 959] x 100
Subtract the new number by the original number
668 - 959 = -291
-291 ÷ 959 = -0.3034410844629823
-0.3034410844629823 x 100 = -30.34%