-28.87% is the change from 485 to 345
Calculation steps:
[( 345 - 485 ) ÷ 485] x 100 = -28.87%
Formula
Percentage change = [(345 - 485) / 485] x 100
Subtract the new number by the original number
345 - 485 = -140
-140 ÷ 485 = -0.28865979381443296
-0.28865979381443296 x 100 = -28.87%