-48.58% is the change from 667 to 343
Calculation steps:
[( 343 - 667 ) ÷ 667] x 100 = -48.58%
Formula
Percentage change = [(343 - 667) / 667] x 100
Subtract the new number by the original number
343 - 667 = -324
-324 ÷ 667 = -0.48575712143928035
-0.48575712143928035 x 100 = -48.58%