-79.88% is the change from 646 to 130
Calculation steps:
[( 130 - 646 ) ÷ 646] x 100 = -79.88%
Formula
Percentage change = [(130 - 646) / 646] x 100
Subtract the new number by the original number
130 - 646 = -516
-516 ÷ 646 = -0.7987616099071208
-0.7987616099071208 x 100 = -79.88%