-50% is the change from 914 to 457
Calculation steps:
[( 457 - 914 ) ÷ 914] x 100 = -50%
Formula
Percentage change = [(457 - 914) / 914] x 100
Subtract the new number by the original number
457 - 914 = -457
-457 ÷ 914 = -0.5
-0.5 x 100 = -50%
Example