-50.71% is the change from 700 to 345
Calculation steps:
[( 345 - 700 ) ÷ 700] x 100 = -50.71%
Formula
Percentage change = [(345 - 700) / 700] x 100
Subtract the new number by the original number
345 - 700 = -355
-355 ÷ 700 = -0.5071428571428571
-0.5071428571428571 x 100 = -50.71%