-30.91% is the change from 495 to 342
Calculation steps:
[( 342 - 495 ) ÷ 495] x 100 = -30.91%
Formula
Percentage change = [(342 - 495) / 495] x 100
Subtract the new number by the original number
342 - 495 = -153
-153 ÷ 495 = -0.3090909090909091
-0.3090909090909091 x 100 = -30.91%