-28.57% is the change from 490 to 350
Calculation steps:
[( 350 - 490 ) ÷ 490] x 100 = -28.57%
Formula
Percentage change = [(350 - 490) / 490] x 100
Subtract the new number by the original number
350 - 490 = -140
-140 ÷ 490 = -0.2857142857142857
-0.2857142857142857 x 100 = -28.57%