-61.5% is the change from 800 to 308
Calculation steps:
[( 308 - 800 ) ÷ 800] x 100 = -61.5%
Formula
Percentage change = [(308 - 800) / 800] x 100
Subtract the new number by the original number
308 - 800 = -492
-492 ÷ 800 = -0.615
-0.615 x 100 = -61.5%