-25.44% is the change from 456 to 340
Calculation steps:
[( 340 - 456 ) ÷ 456] x 100 = -25.44%
Formula
Percentage change = [(340 - 456) / 456] x 100
Subtract the new number by the original number
340 - 456 = -116
-116 ÷ 456 = -0.2543859649122807
-0.2543859649122807 x 100 = -25.44%