-32.6% is the change from 678 to 457
Calculation steps:
[( 457 - 678 ) ÷ 678] x 100 = -32.6%
Formula
Percentage change = [(457 - 678) / 678] x 100
Subtract the new number by the original number
457 - 678 = -221
-221 ÷ 678 = -0.32595870206489674
-0.32595870206489674 x 100 = -32.6%