-48.43% is the change from 667 to 344
Calculation steps:
[( 344 - 667 ) ÷ 667] x 100 = -48.43%
Formula
Percentage change = [(344 - 667) / 667] x 100
Subtract the new number by the original number
344 - 667 = -323
-323 ÷ 667 = -0.48425787106446777
-0.48425787106446777 x 100 = -48.43%