-82.3% is the change from 678 to 120
Calculation steps:
[( 120 - 678 ) ÷ 678] x 100 = -82.3%
Formula
Percentage change = [(120 - 678) / 678] x 100
Subtract the new number by the original number
120 - 678 = -558
-558 ÷ 678 = -0.8230088495575221
-0.8230088495575221 x 100 = -82.3%