-23.5% is the change from 800 to 612
Calculation steps:
[( 612 - 800 ) ÷ 800] x 100 = -23.5%
Formula
Percentage change = [(612 - 800) / 800] x 100
Subtract the new number by the original number
612 - 800 = -188
-188 ÷ 800 = -0.235
-0.235 x 100 = -23.5%