-78.68% is the change from 999 to 213
Calculation steps:
[( 213 - 999 ) ÷ 999] x 100 = -78.68%
Formula
Percentage change = [(213 - 999) / 999] x 100
Subtract the new number by the original number
213 - 999 = -786
-786 ÷ 999 = -0.7867867867867868
-0.7867867867867868 x 100 = -78.68%