-39.68% is the change from 688 to 415
Calculation steps:
[( 415 - 688 ) ÷ 688] x 100 = -39.68%
Formula
Percentage change = [(415 - 688) / 688] x 100
Subtract the new number by the original number
415 - 688 = -273
-273 ÷ 688 = -0.39680232558139533
-0.39680232558139533 x 100 = -39.68%