-38.9% is the change from 1000 to 611
Calculation steps:
[( 611 - 1000 ) ÷ 1000] x 100 = -38.9%
Formula
Percentage change = [(611 - 1000) / 1000] x 100
Subtract the new number by the original number
611 - 1000 = -389
-389 ÷ 1000 = -0.389
-0.389 x 100 = -38.9%