-58.53% is the change from 668 to 277
Calculation steps:
[( 277 - 668 ) ÷ 668] x 100 = -58.53%
Formula
Percentage change = [(277 - 668) / 668] x 100
Subtract the new number by the original number
277 - 668 = -391
-391 ÷ 668 = -0.5853293413173652
-0.5853293413173652 x 100 = -58.53%