-50.07% is the change from 691 to 345
Calculation steps:
[( 345 - 691 ) ÷ 691] x 100 = -50.07%
Formula
Percentage change = [(345 - 691) / 691] x 100
Subtract the new number by the original number
345 - 691 = -346
-346 ÷ 691 = -0.5007235890014472
-0.5007235890014472 x 100 = -50.07%