-67.7% is the change from 1000 to 323
Calculation steps:
[( 323 - 1000 ) ÷ 1000] x 100 = -67.7%
Formula
Percentage change = [(323 - 1000) / 1000] x 100
Subtract the new number by the original number
323 - 1000 = -677
-677 ÷ 1000 = -0.677
-0.677 x 100 = -67.7%