-28.95% is the change from 456 to 324
Calculation steps:
[( 324 - 456 ) ÷ 456] x 100 = -28.95%
Formula
Percentage change = [(324 - 456) / 456] x 100
Subtract the new number by the original number
324 - 456 = -132
-132 ÷ 456 = -0.2894736842105263
-0.2894736842105263 x 100 = -28.95%