-82.88% is the change from 800 to 137
Calculation steps:
[( 137 - 800 ) ÷ 800] x 100 = -82.88%
Formula
Percentage change = [(137 - 800) / 800] x 100
Subtract the new number by the original number
137 - 800 = -663
-663 ÷ 800 = -0.82875
-0.82875 x 100 = -82.88%