-22.1% is the change from 1000 to 779
Calculation steps:
[( 779 - 1000 ) ÷ 1000] x 100 = -22.1%
Formula
Percentage change = [(779 - 1000) / 1000] x 100
Subtract the new number by the original number
779 - 1000 = -221
-221 ÷ 1000 = -0.221
-0.221 x 100 = -22.1%