-85.25% is the change from 678 to 100
Calculation steps:
[( 100 - 678 ) ÷ 678] x 100 = -85.25%
Formula
Percentage change = [(100 - 678) / 678] x 100
Subtract the new number by the original number
100 - 678 = -578
-578 ÷ 678 = -0.8525073746312685
-0.8525073746312685 x 100 = -85.25%