-49.49% is the change from 683 to 345
Calculation steps:
[( 345 - 683 ) ÷ 683] x 100 = -49.49%
Formula
Percentage change = [(345 - 683) / 683] x 100
Subtract the new number by the original number
345 - 683 = -338
-338 ÷ 683 = -0.49487554904831627
-0.49487554904831627 x 100 = -49.49%