-98.98% is the change from 686 to 7
Calculation steps:
[( 7 - 686 ) ÷ 686] x 100 = -98.98%
Formula
Percentage change = [(7 - 686) / 686] x 100
Subtract the new number by the original number
7 - 686 = -679
-679 ÷ 686 = -0.9897959183673469
-0.9897959183673469 x 100 = -98.98%