-76.16% is the change from 646 to 154
Calculation steps:
[( 154 - 646 ) ÷ 646] x 100 = -76.16%
Formula
Percentage change = [(154 - 646) / 646] x 100
Subtract the new number by the original number
154 - 646 = -492
-492 ÷ 646 = -0.7616099071207431
-0.7616099071207431 x 100 = -76.16%