-35% is the change from 1000 to 650
Calculation steps:
[( 650 - 1000 ) ÷ 1000] x 100 = -35%
Formula
Percentage change = [(650 - 1000) / 1000] x 100
Subtract the new number by the original number
650 - 1000 = -350
-350 ÷ 1000 = -0.35
-0.35 x 100 = -35%