-72.88% is the change from 800 to 217
Calculation steps:
[( 217 - 800 ) ÷ 800] x 100 = -72.88%
Formula
Percentage change = [(217 - 800) / 800] x 100
Subtract the new number by the original number
217 - 800 = -583
-583 ÷ 800 = -0.72875
-0.72875 x 100 = -72.88%