-80.26% is the change from 684 to 135
Calculation steps:
[( 135 - 684 ) ÷ 684] x 100 = -80.26%
Formula
Percentage change = [(135 - 684) / 684] x 100
Subtract the new number by the original number
135 - 684 = -549
-549 ÷ 684 = -0.8026315789473685
-0.8026315789473685 x 100 = -80.26%