-18.31% is the change from 415 to 339
Calculation steps:
[( 339 - 415 ) ÷ 415] x 100 = -18.31%
Formula
Percentage change = [(339 - 415) / 415] x 100
Subtract the new number by the original number
339 - 415 = -76
-76 ÷ 415 = -0.18313253012048192
-0.18313253012048192 x 100 = -18.31%