-13.6% is the change from 669 to 578
Calculation steps:
[( 578 - 669 ) ÷ 669] x 100 = -13.6%
Formula
Percentage change = [(578 - 669) / 669] x 100
Subtract the new number by the original number
578 - 669 = -91
-91 ÷ 669 = -0.13602391629297458
-0.13602391629297458 x 100 = -13.6%