-29.42% is the change from 486 to 343
Calculation steps:
[( 343 - 486 ) ÷ 486] x 100 = -29.42%
Formula
Percentage change = [(343 - 486) / 486] x 100
Subtract the new number by the original number
343 - 486 = -143
-143 ÷ 486 = -0.294238683127572
-0.294238683127572 x 100 = -29.42%