-21.82% is the change from 999 to 781
Calculation steps:
[( 781 - 999 ) ÷ 999] x 100 = -21.82%
Formula
Percentage change = [(781 - 999) / 999] x 100
Subtract the new number by the original number
781 - 999 = -218
-218 ÷ 999 = -0.2182182182182182
-0.2182182182182182 x 100 = -21.82%