-51.33% is the change from 678 to 330
Calculation steps:
[( 330 - 678 ) ÷ 678] x 100 = -51.33%
Formula
Percentage change = [(330 - 678) / 678] x 100
Subtract the new number by the original number
330 - 678 = -348
-348 ÷ 678 = -0.5132743362831859
-0.5132743362831859 x 100 = -51.33%