-29.48% is the change from 485 to 342
Calculation steps:
[( 342 - 485 ) ÷ 485] x 100 = -29.48%
Formula
Percentage change = [(342 - 485) / 485] x 100
Subtract the new number by the original number
342 - 485 = -143
-143 ÷ 485 = -0.2948453608247423
-0.2948453608247423 x 100 = -29.48%