-3.22% is the change from 684 to 662
Calculation steps:
[( 662 - 684 ) ÷ 684] x 100 = -3.22%
Formula
Percentage change = [(662 - 684) / 684] x 100
Subtract the new number by the original number
662 - 684 = -22
-22 ÷ 684 = -0.03216374269005848
-0.03216374269005848 x 100 = -3.22%