-69.4% is the change from 1000 to 306
Calculation steps:
[( 306 - 1000 ) ÷ 1000] x 100 = -69.4%
Formula
Percentage change = [(306 - 1000) / 1000] x 100
Subtract the new number by the original number
306 - 1000 = -694
-694 ÷ 1000 = -0.694
-0.694 x 100 = -69.4%