-15.94% is the change from 345 to 290
Calculation steps:
[( 290 - 345 ) ÷ 345] x 100 = -15.94%
Formula
Percentage change = [(290 - 345) / 345] x 100
Subtract the new number by the original number
290 - 345 = -55
-55 ÷ 345 = -0.15942028985507245
-0.15942028985507245 x 100 = -15.94%