-64.9% is the change from 1000 to 351
Calculation steps:
[( 351 - 1000 ) ÷ 1000] x 100 = -64.9%
Formula
Percentage change = [(351 - 1000) / 1000] x 100
Subtract the new number by the original number
351 - 1000 = -649
-649 ÷ 1000 = -0.649
-0.649 x 100 = -64.9%