-41.98% is the change from 686 to 398
Calculation steps:
[( 398 - 686 ) ÷ 686] x 100 = -41.98%
Formula
Percentage change = [(398 - 686) / 686] x 100
Subtract the new number by the original number
398 - 686 = -288
-288 ÷ 686 = -0.4198250728862974
-0.4198250728862974 x 100 = -41.98%