-58.68% is the change from 668 to 276
Calculation steps:
[( 276 - 668 ) ÷ 668] x 100 = -58.68%
Formula
Percentage change = [(276 - 668) / 668] x 100
Subtract the new number by the original number
276 - 668 = -392
-392 ÷ 668 = -0.5868263473053892
-0.5868263473053892 x 100 = -58.68%