-29.59% is the change from 490 to 345
Calculation steps:
[( 345 - 490 ) ÷ 490] x 100 = -29.59%
Formula
Percentage change = [(345 - 490) / 490] x 100
Subtract the new number by the original number
345 - 490 = -145
-145 ÷ 490 = -0.29591836734693877
-0.29591836734693877 x 100 = -29.59%