-50.14% is the change from 690 to 344
Calculation steps:
[( 344 - 690 ) ÷ 690] x 100 = -50.14%
Formula
Percentage change = [(344 - 690) / 690] x 100
Subtract the new number by the original number
344 - 690 = -346
-346 ÷ 690 = -0.5014492753623189
-0.5014492753623189 x 100 = -50.14%