-18.27% is the change from 646 to 528
Calculation steps:
[( 528 - 646 ) ÷ 646] x 100 = -18.27%
Formula
Percentage change = [(528 - 646) / 646] x 100
Subtract the new number by the original number
528 - 646 = -118
-118 ÷ 646 = -0.1826625386996904
-0.1826625386996904 x 100 = -18.27%