-7.89% is the change from 456 to 420
Calculation steps:
[( 420 - 456 ) ÷ 456] x 100 = -7.89%
Formula
Percentage change = [(420 - 456) / 456] x 100
Subtract the new number by the original number
420 - 456 = -36
-36 ÷ 456 = -0.07894736842105263
-0.07894736842105263 x 100 = -7.89%