-78.5% is the change from 1000 to 215
Calculation steps:
[( 215 - 1000 ) ÷ 1000] x 100 = -78.5%
Formula
Percentage change = [(215 - 1000) / 1000] x 100
Subtract the new number by the original number
215 - 1000 = -785
-785 ÷ 1000 = -0.785
-0.785 x 100 = -78.5%