-90.71% is the change from 678 to 63
Calculation steps:
[( 63 - 678 ) ÷ 678] x 100 = -90.71%
Formula
Percentage change = [(63 - 678) / 678] x 100
Subtract the new number by the original number
63 - 678 = -615
-615 ÷ 678 = -0.9070796460176991
-0.9070796460176991 x 100 = -90.71%