-75.15% is the change from 684 to 170
Calculation steps:
[( 170 - 684 ) ÷ 684] x 100 = -75.15%
Formula
Percentage change = [(170 - 684) / 684] x 100
Subtract the new number by the original number
170 - 684 = -514
-514 ÷ 684 = -0.7514619883040936
-0.7514619883040936 x 100 = -75.15%