-39.47% is the change from 456 to 276
Calculation steps:
[( 276 - 456 ) ÷ 456] x 100 = -39.47%
Formula
Percentage change = [(276 - 456) / 456] x 100
Subtract the new number by the original number
276 - 456 = -180
-180 ÷ 456 = -0.39473684210526316
-0.39473684210526316 x 100 = -39.47%