-80.32% is the change from 686 to 135
Calculation steps:
[( 135 - 686 ) ÷ 686] x 100 = -80.32%
Formula
Percentage change = [(135 - 686) / 686] x 100
Subtract the new number by the original number
135 - 686 = -551
-551 ÷ 686 = -0.8032069970845481
-0.8032069970845481 x 100 = -80.32%