-13.3% is the change from 609 to 528
Calculation steps:
[( 528 - 609 ) ÷ 609] x 100 = -13.3%
Formula
Percentage change = [(528 - 609) / 609] x 100
Subtract the new number by the original number
528 - 609 = -81
-81 ÷ 609 = -0.1330049261083744
-0.1330049261083744 x 100 = -13.3%