-91.98% is the change from 686 to 55
Calculation steps:
[( 55 - 686 ) ÷ 686] x 100 = -91.98%
Formula
Percentage change = [(55 - 686) / 686] x 100
Subtract the new number by the original number
55 - 686 = -631
-631 ÷ 686 = -0.9198250728862973
-0.9198250728862973 x 100 = -91.98%