-77.34% is the change from 684 to 155
Calculation steps:
[( 155 - 684 ) ÷ 684] x 100 = -77.34%
Formula
Percentage change = [(155 - 684) / 684] x 100
Subtract the new number by the original number
155 - 684 = -529
-529 ÷ 684 = -0.7733918128654971
-0.7733918128654971 x 100 = -77.34%