-97.42% is the change from 814 to 21
Calculation steps:
[( 21 - 814 ) ÷ 814] x 100 = -97.42%
Formula
Percentage change = [(21 - 814) / 814] x 100
Subtract the new number by the original number
21 - 814 = -793
-793 ÷ 814 = -0.9742014742014742
-0.9742014742014742 x 100 = -97.42%