-50.5% is the change from 697 to 345
Calculation steps:
[( 345 - 697 ) ÷ 697] x 100 = -50.5%
Formula
Percentage change = [(345 - 697) / 697] x 100
Subtract the new number by the original number
345 - 697 = -352
-352 ÷ 697 = -0.5050215208034433
-0.5050215208034433 x 100 = -50.5%