-98.55% is the change from 688 to 10
Calculation steps:
[( 10 - 688 ) ÷ 688] x 100 = -98.55%
Formula
Percentage change = [(10 - 688) / 688] x 100
Subtract the new number by the original number
10 - 688 = -678
-678 ÷ 688 = -0.9854651162790697
-0.9854651162790697 x 100 = -98.55%