-49.93% is the change from 667 to 334
Calculation steps:
[( 334 - 667 ) ÷ 667] x 100 = -49.93%
Formula
Percentage change = [(334 - 667) / 667] x 100
Subtract the new number by the original number
334 - 667 = -333
-333 ÷ 667 = -0.4992503748125937
-0.4992503748125937 x 100 = -49.93%