-50% is the change from 702 to 351
Calculation steps:
[( 351 - 702 ) ÷ 702] x 100 = -50%
Formula
Percentage change = [(351 - 702) / 702] x 100
Subtract the new number by the original number
351 - 702 = -351
-351 ÷ 702 = -0.5
-0.5 x 100 = -50%
Example