-3.09% is the change from 356 to 345
Calculation steps:
[( 345 - 356 ) ÷ 356] x 100 = -3.09%
Formula
Percentage change = [(345 - 356) / 356] x 100
Subtract the new number by the original number
345 - 356 = -11
-11 ÷ 356 = -0.03089887640449438
-0.03089887640449438 x 100 = -3.09%