-50.44% is the change from 688 to 341
Calculation steps:
[( 341 - 688 ) ÷ 688] x 100 = -50.44%
Formula
Percentage change = [(341 - 688) / 688] x 100
Subtract the new number by the original number
341 - 688 = -347
-347 ÷ 688 = -0.5043604651162791
-0.5043604651162791 x 100 = -50.44%