-49.78% is the change from 667 to 335
Calculation steps:
[( 335 - 667 ) ÷ 667] x 100 = -49.78%
Formula
Percentage change = [(335 - 667) / 667] x 100
Subtract the new number by the original number
335 - 667 = -332
-332 ÷ 667 = -0.49775112443778113
-0.49775112443778113 x 100 = -49.78%