-85.38% is the change from 684 to 100
Calculation steps:
[( 100 - 684 ) ÷ 684] x 100 = -85.38%
Formula
Percentage change = [(100 - 684) / 684] x 100
Subtract the new number by the original number
100 - 684 = -584
-584 ÷ 684 = -0.8538011695906432
-0.8538011695906432 x 100 = -85.38%