-55.01% is the change from 678 to 305
Calculation steps:
[( 305 - 678 ) ÷ 678] x 100 = -55.01%
Formula
Percentage change = [(305 - 678) / 678] x 100
Subtract the new number by the original number
305 - 678 = -373
-373 ÷ 678 = -0.5501474926253688
-0.5501474926253688 x 100 = -55.01%