-50.07% is the change from 667 to 333
Calculation steps:
[( 333 - 667 ) ÷ 667] x 100 = -50.07%
Formula
Percentage change = [(333 - 667) / 667] x 100
Subtract the new number by the original number
333 - 667 = -334
-334 ÷ 667 = -0.5007496251874063
-0.5007496251874063 x 100 = -50.07%