-14.47% is the change from 456 to 390
Calculation steps:
[( 390 - 456 ) ÷ 456] x 100 = -14.47%
Formula
Percentage change = [(390 - 456) / 456] x 100
Subtract the new number by the original number
390 - 456 = -66
-66 ÷ 456 = -0.14473684210526316
-0.14473684210526316 x 100 = -14.47%