-37.87% is the change from 668 to 415
Calculation steps:
[( 415 - 668 ) ÷ 668] x 100 = -37.87%
Formula
Percentage change = [(415 - 668) / 668] x 100
Subtract the new number by the original number
415 - 668 = -253
-253 ÷ 668 = -0.3787425149700599
-0.3787425149700599 x 100 = -37.87%