-50.36% is the change from 691 to 343
Calculation steps:
[( 343 - 691 ) ÷ 691] x 100 = -50.36%
Formula
Percentage change = [(343 - 691) / 691] x 100
Subtract the new number by the original number
343 - 691 = -348
-348 ÷ 691 = -0.5036179450072359
-0.5036179450072359 x 100 = -50.36%