-20.96% is the change from 415 to 328
Calculation steps:
[( 328 - 415 ) ÷ 415] x 100 = -20.96%
Formula
Percentage change = [(328 - 415) / 415] x 100
Subtract the new number by the original number
328 - 415 = -87
-87 ÷ 415 = -0.20963855421686747
-0.20963855421686747 x 100 = -20.96%