-17.35% is the change from 415 to 343
Calculation steps:
[( 343 - 415 ) ÷ 415] x 100 = -17.35%
Formula
Percentage change = [(343 - 415) / 415] x 100
Subtract the new number by the original number
343 - 415 = -72
-72 ÷ 415 = -0.17349397590361446
-0.17349397590361446 x 100 = -17.35%