-28.99% is the change from 345 to 245
Calculation steps:
[( 245 - 345 ) ÷ 345] x 100 = -28.99%
Formula
Percentage change = [(245 - 345) / 345] x 100
Subtract the new number by the original number
245 - 345 = -100
-100 ÷ 345 = -0.2898550724637681
-0.2898550724637681 x 100 = -28.99%