-40.88% is the change from 680 to 402
Calculation steps:
[( 402 - 680 ) ÷ 680] x 100 = -40.88%
Formula
Percentage change = [(402 - 680) / 680] x 100
Subtract the new number by the original number
402 - 680 = -278
-278 ÷ 680 = -0.4088235294117647
-0.4088235294117647 x 100 = -40.88%