-15.5% is the change from 684 to 578
Calculation steps:
[( 578 - 684 ) ÷ 684] x 100 = -15.5%
Formula
Percentage change = [(578 - 684) / 684] x 100
Subtract the new number by the original number
578 - 684 = -106
-106 ÷ 684 = -0.15497076023391812
-0.15497076023391812 x 100 = -15.5%