-30.2% is the change from 490 to 342
Calculation steps:
[( 342 - 490 ) ÷ 490] x 100 = -30.2%
Formula
Percentage change = [(342 - 490) / 490] x 100
Subtract the new number by the original number
342 - 490 = -148
-148 ÷ 490 = -0.3020408163265306
-0.3020408163265306 x 100 = -30.2%