-3.51% is the change from 569 to 549
Calculation steps:
[( 549 - 569 ) ÷ 569] x 100 = -3.51%
Formula
Percentage change = [(549 - 569) / 569] x 100
Subtract the new number by the original number
549 - 569 = -20
-20 ÷ 569 = -0.0351493848857645
-0.0351493848857645 x 100 = -3.51%