-49.56% is the change from 688 to 347
Calculation steps:
[( 347 - 688 ) ÷ 688] x 100 = -49.56%
Formula
Percentage change = [(347 - 688) / 688] x 100
Subtract the new number by the original number
347 - 688 = -341
-341 ÷ 688 = -0.4956395348837209
-0.4956395348837209 x 100 = -49.56%