-25.27% is the change from 455 to 340
Calculation steps:
[( 340 - 455 ) ÷ 455] x 100 = -25.27%
Formula
Percentage change = [(340 - 455) / 455] x 100
Subtract the new number by the original number
340 - 455 = -115
-115 ÷ 455 = -0.25274725274725274
-0.25274725274725274 x 100 = -25.27%